With Omi gone to the dark side and Master Fung in an unshakeable meditative state, things look bad. They get worse when Chase Young uses the Serpent's Tail/Reversing Mirror combo to restore Wuya to her human form, albeit without her powers. Meanwhile, the Warriors minus Omi discover that it was Chase who sent Master Fung into the Ying-Yang world, and that unless you have the Yang Yo-Yo, your good chi will be trapped there. Master Fung apparently put himself in a meditative state to keep his evil side under control, but Omi wasn't so lucky. The Warriors and Dojo, with Jack Spicer tagging along, decide to retrieve Omi and Master Fung's chi from the Ying-Yang world . . .

Omi successfully switches Chase Young's evil soup with pea soup which stops him from going evil. However, in exchange, the future changed for the worse. Hannibal turns Master Monk Guan evil instead of Chase, Master Fung is trapped in the Ying-Yang world and Jack turns good. After acquiring the soup Omi hid in the past, they are captured by Hannibal and his crew. Chase then sacrifices his good side to free the Warriors. After the Warriors get to the Heylin seed's vault (where Omi is frozen), Hannibal and his crew start a Xiaolin Showdown. Can the new Warriors defeat Hannibal, Wuya, Chase Young and Master Monk Guan in a 4-way tag team Xiaolin Showdown? And finally, who will be made the new leader?

Now with the world under his rule and Omi one of his many jungle cats, Chase is all-powerful. The world is in jeopardy, and it's up to the monks, Dojo and Jack to restore peace. The invisible creature that escaped the Ying-Yang world turns out to be the Chi guardian, who is out to retrieve every chi that was taken. After the creature takes Kimiko, Raimundo and Clay's chi, Dojo and Jack devise a plan on getting it back along with trapping the Chi guardian back in the Ying-Yang world. Once the Warriors' chi returns, they challenge Chase to a showdown in order to finally bring Omi back to the side of good.

After learning none of the Shen-Gong-Wu can stop Wuya, the Xiaolin Apprentices team up with Jack. They figure out the only way they can put an end to Wuya's reign is to travel back in time 1500 years, where Grandmaster Dashi first defeated her. Omi goes through Jack's time machine alone with only one Shen-Gong-Wu, leaving the rest with the other three to protect themselves. Omi's plan is to find Dashi and receive another puzzlebox to trap Wuya in.

Master Fung tells the monks that the leader will be revealed after they do their last quest. Omi decides to go back in time and stop Chase from entering the Heylin side. Realizing that he needs the Sands of Time, Omi freezes himself for 80 years in order to talk to his old self.

After receiving a warning message from Omi in the future, the Warriors set out to find the time-traveling Shen-Gong-Wu, Sands of Time. In the message, future Omi explains that evil is ruling the universe, and the Sands of Time is the key to changing the future. Jack, however, beats them to it and uses it to travel back in time to recruit some of the world's ruthless villains. He also brings his future self into the present time, knowing that future Jack already knows the locations of all the Shen-Gong-Wu before they reveal themselves!

With the Shadow of Fear and Sapphire Dragon, Hannibal Bean enters Raimundo's mind to bring out his worst fear and use it against him and the monks. While they are busy fighting his fear, Bean puts his plan into motion to try and slowly break down Raimundo....but soon finds out things may not turn out the way he expected.

Chase Young is looking for an apprentice. Either Katnappé or Jack will be able to win it. Katnappé has reprogrammed the Warriors' U-bots to be evil. Master Fung informs the Warriors that their new threat is Chase Young, and he must teach the four monks to be deceptive in order to triumph. However, Omi is too trustworthy. After Chase chooses Katnappé to be his apprentice, Jack turns to the Warriors and asks to join the side of good. Omi trains Jack the best he can to release all the evil that is inside of him, but after Katnappé attacks the Temple, Jack takes off with the Warriors' Wu, which tests Omi's trust.

Master Fung tells the Warriors that one of them will soon advance to Wudai Warrior level, and each one is convinced that it is them. A new Shen-Gong-Wu is revealed, the Ying Yo-Yo, which acts as a portal to the Ying-Yang world. After losing the Wu, the Warriors learn that Master Fung has been taken and transported to the Ying-Yang world, but they cannot rescue him without the Ying Yo-Yo. Omi goes to Chase Young for help, who agrees to assist him. After finding the Yo-Yo, Omi enters the Ying-Yang world and rescues Master Fung, but upon leaving, Omi's good chi stays while his bad chi begins to take over . . .

Hannibal Bean gets into Omi's head while he is sleeping and tells Omi that he should take all the Wudai Warriors elemental Shen-Gong-Wu and master the power of the elements to become the Xiaolin Leader. The whole thing was a set plot for Hannibal Bean, now will Hannibal Bean destroy Omi and take his elemental powers, or can Omi stop Hannibal Bean before it's too late?

With Omi still trapped in the past, the Dragons and Jack Spicer are captured by Wuya's evil forces. The final chapter is at hand, and Raimundo must come to gripes on where he belongs...

In preparation for going up against Hannibal Bean, Master Fung sends the Warriors and Dojo to a new temple, which turns out to be run by Master Monk Guan. Due to the arduous training and hostility with Guan, Raimundo quits and seemingly joins Hannibal Bean.

Kimiko uses her PDA, the Mind Reader Conch, Changing Chopsticks and the Eye of Dashi to connect herself to a satellite so that she can read the world's thoughts. Hannibal Bean spies on her and acquires secret information about Chase's weakness by the Heylin Eclipse. Wuya teams up with Hannibal in an effort to destroy Chase and steal all the Shen-Gong-Wu.

A new Shen-Gong-Wu is revealed, the Rio Reverso! A Wu that can change any object into its original form. Jack goes after it and with some help from Wuya Jack receives the Rio Reverso. Jack plots a plan to make an army of baby Dinosaurs made from oil. Wuya steals Jacks Rio Reverso and Wuya steals Jacks idea of an army of Dinosaurs and she ends up creating an adult T-Rex. How will the Wudai Warriors face this Dinosaur?

Guan, one of the greatest warriors of all time, shows up and meets the Xiaolin Warriors for the first time. Guan tricks Dojo to accompany him to a palace where Chase Young, one of the most evil villains of all time, resides. However, Dojo doesn't know this. There, Guan trades Dojo to Chase in order to get his Spear of Guan back. Without the Spear, Guan is practically nothing. Dojo is horrified when he learns what Chase plans to do with him.

Upon seeing the rare Heylin comet circling the Earth, Master Fung orders the Warriors to not use any Shen-Gong-Wu for three days. The comet makes the Wu have a mind of their own if used by anyone. Wuya sees this as an opportunity to tempt the Warriors to use the Wu. After using the Golden Tiger Claws and Sword of the Storm to save his hometown from a volcano eruption caused by Jack and Wuya, Raimundo literally becomes attached to the Claws. The Shen-Gong-Wu begin to have a mind of their own and attach to Raimundo, making him 'monster-like'. Once Raimundo loses all his self control, Wuya plans to take over his body and finally carry out her plans to rule the world.

After Jack inadvertantly releases the world's most biggest and powerful spiders, the Warriors, Jack, and Chase Young temporarily team up to stop the spiders before they proceed to consume the world. Kimiko, Raimundo, Clay, and Jack are captured while Chase and Omi escape. To look for an answer on how to defeat the spiders, they combine the Fountain of Hui and Eagle Scope. Will Omi and Chase be able to find the answer and put an end to the spiders' reign?

The monks are now Wudai warriors, and they are going on their first Wudai quest. They received an omen from the singing old lady that the Bird of Paradise is coming. Their quest is to find the Bird of Paradise using a mystical leaf and using no Shen-Gong-Wu, they must search for the bird in Chase Young's domain. Using their new Wudai powers they've overcome obstacles that Chase Young has put in their way. When the warriors found the bird, they met with Chase and had a battle. At the end of the battle Jack appeared and took the bird. For our warriors, they were sad. Chase and Wuya left. And the same singing old lady comes back... What is the lady going to say to our warriors?

After Katnappé releases Wuya from the puzzle box, the two form an unhealthy alliance. Jack builds another robot, but this time, it's a clone of himself, who is much quicker, smarter, and gets all the good jokes. Jack and his clone use the newest Shen-Gong-Wu, Shard of Lightning, to freeze time and quickly steal most of the Warriors' Shen-Gong-Wu. The Warriors must think of a plan to stop them, while Wuya starts to regret teaming up with Katnappé.

After helping the Warriors acquire a new Shen-Gong-Wu, a Russian vendor named Vlad joins the Xiaolin Dragons-in-training. When Omi uses the new Shen-Gong-Wu, Crystal Glasses, he sees that he becomes evil in the future. Upon seeing this, he quickly leaves the Xiaolin Temple, deciding that he can no longer continue to be a Xiaolin Dragon-in-training.

Using the newest Shen-Gong-Wu, Shadow of Fear, Jack enters the Warriors' dreams to bring their deepest and darkest fear to life. With no one guarding the Temple vault, Jack easily steals some Shen-Gong-Wu. Master Fung advises the Warriors that they must face their fear in order to ultimately overcome it. All the while, Jack directs a movie about his adventures with the Warriors.

After Kimiko accidentally breaks the Mosaic Scale, she hides the pieces in Clay's room. The next day, Clay starts acting weird ... and acting up. It turns out that the Mosaic Scale was used to contain a mischievous spirit named Sabeeny, an earwig who has possessed the Dragon of Earth. If Sabeeny finds the Monarch Wings, the sister Shen-Gong-Wu to the Scale, and combines them with the Mosaic Scale, it will no longer need a host! The earwig will become invincible! Can the Warriors stop Sabeeny?

After trapping Chase Young in the Sphere of Yun, Jack and his newest partner, Cyclops, take over his lair. He then proceeds to attack the Xiaolin Temple, stealing Shen-Gong-Wu from the vault. Omi later frees Chase using the Reversing Mirror, returning the 'favor' he owed him from earlier. The other Warriors do not know Omi freed him. Chase slowly tries to mold Omi into the true evil warrior he knows the young monk will become.

Jermaine returns and joins the Warriors as a Wudai Warrior, which is more advanced than a Xiaolin Apprentice. Omi is discouraged that Jermaine is ranked higher than him, and they constantly confront each other because of it. Jack soon learns that Jermaine's master is Chase Young, who doesn't know Chase is on the side of evil. Upon hearing this, the Warriors rush to notify Jermaine before it's too late. However, because of his encounter with Omi earlier, Jermaine refuses to listen.

Master Fung sends the Warriors on a quest to find the Treasure of the Blind Swordsman. While on their quest, the Warriors will locate their new Wudai Weapons, each chosen for a particular monk. However, with Wuya and Jack hot on their trail, and Hannibal Bean secretly plotting something of his own, will the Warriors be able to succeed?