Jackie and Jade set out to find the Snake Talisman in a cave in South America. They cross paths with an egotistical "archaeologist" shooting for a TV show. After catching wind of their quest the "archaeologist" steals the Talisman. Things become more complicated after the Dark Hand shows up.

Jade befriends the boy king of Tangra when he comes to visit, and uses the Snake Talisman to get out for some much-needed fun. Unfortunately, this falls right into a plot to kidnap the young king and hold him for ransom.

Jackie discovers a necklace, known as the Eye of Aurora, that allows its user to teleport anywhere by saying "Return to (name of place)". To occupy Jade, he signs her up for Buttercup Scouts. However, an evil treasure hunter arrives looking for the necklace, which Jade has taken on a camping trip to Summit Hill with Jackie.

The museum asks Jackie to help someone who claims to have made a major discovery in the arctic circle.

Daolon Wong's failed attempt to escape from prison through the use of magic reawakens Tarakudo, the king of the shadowkahn who is bent on recovering all nine oni masks that imprison his generals. Tarakudo attempts to free himself and his minions so that they can unleash total darkness upon the earth.

Ratso obtains the next Oni mask and has summoned a new deadlier type of Shadowkahn with sharp metallic claws and razor pointed feet that appear to be unstoppable. Meanwhile, Uncle begins to doubt himself as believes he is no longer useful to the group because he is not well versed in Japanese legend and magic.

A new Oni mask has been discovered in San Fransisco. Will Hak Fu finally get to wear the mask? No! Who better than Jade's dog scruffy to command the new tribe of winged shadowkan?

While attempting to stop the Enforcers from getting the fourth oni mask, it accidentally lands on Captain Black's face. He uses the powers of the mask to help him easily take down the Enforcers. Jackie and the rest of the group become worried when Captain Black becomes very intrigued and excited by his newfound abilities. Captain Black's true good side is able to ward off the influence of the mask for a while, but the dark power of the oni begins to slowly corrupt and take hold of him. When the darker oni Captain Black finally emerges, he attempts to take advantage of his full access to Section 13. Jackie, Jade, Uncle, and Tohru race to work on a way to keep the other three stored masks away from Black as they search for the ingredient needed to perform a removal spell.

Jackie and the gang gets the next Oni mask and also found the archive of the demons. The mask that they found happends to have a full chapter on the mask so Jade asks lets put the talisman on the mask and question it? Somehow the mask jumps on Tohru's behind and on to another and another until it finally reaches Finn's car. Tarakudo asks everyone to find it because it has found its way out. So finn takes a walk to his car and sits on the mask. Long story short, they capture Tohru and the mask forces him to put it on his face so then Jackie saves the day once again.

Paco tries on a mystical Oni mask in order to outdo Jade's scary costume on Halloween.

Jackie and the enforcers locate the seventh oni mask at a yard sale where it is eventually bought by a man who owns a site the sales antiques. It is then sold and won by some rich guy who ends up being Valmont. Jackie and the enforcers go to Valmont's apartment to get the mask and there is a big fight. During the fight, the mask is broken in half by Hak-Foo and one half goes to Valmont and the other is caught by jade. Valmont puts on his half and summons half of the shadowkahn. Jade puts on the other half and summons the other half, which don't have heads). They end up in a building where the two halves of the maske get together and combine the shadowkahn into one so that they can defeat Jackie. While this is happening, Jade and Valmont are trying to get the half masks off themelves because Valmont wants money and the mask wants power. Eventually they get the mask removal potion and take the halves off each other.

After many failed attempts to acquire the power of an oni mask, Hak-Foo finally gets one. He is a disappointed in the small size of his shark like shadowkahn, but Hak-Foo soon discovers their monstrous appetite for devouring shadows.

Ratso, Finn and Chow decide to become good guys, but they realize they're not much better at being good than bad!

Jade gets the surprise of her life when she is visited by... herself, from the future! Future Jade is trying to stop Shendu's son, Drago, from getting a bunch of magic dragon's teeth so that he can free his father.

The J-Team unites to battle the anti-J-Team, and Jade casts a spell that backfires and turns the J-Team into toddlers.

Jackie and Daolon Wong literally race against time to retrieve the Déjà  vu stone, which is responsible for their trip into the past. Uncle attempts to help Jackie from the present as he and Jade watch what is happening through a time window. As Jade watches, she begins to wonder whether she is responsible for all the problems that has been happening in Jackie's life.

Jackie, Uncle, Tohru, and Jade discover that they have overlook something in the ancient writings by making the horrible mistake of placing the final oni mask along side the other eight in Section 13. By doing this, they have released Tarakudo and his generals from the masks that bind them. The entire world begins to be engulfed in total darkness as the shadokahn are now free to walk the earth.

Drago breaks out of Section 13 on a mission to absorb the demon chi that is held in the original artifacts used to defeat the demons so many years ago. He finds the Enforcers at a petting zoo and transforms them into dragon-human hybrids. Drago locates the fan that holds the chi of the Wind Demon. Meanwhile, Jade gets into the nasty habit of burping. Jackie and Captain Black hunt Drago down to a Chinese-themed car wash, where the fan is located. Unbeknownst to everyone, Jade absorbs the demon chi. At school, her burps create powerful wind storms, and she begins to transform into a frog. Drago attacks Jade at school in order to absorb the chi, but Uncle and Tohru arrive to capture it instead. Drago fires the Enforcers and turns them back into their old human selves after they prove that they are weak and useless.

Uncle has fashioned a locater for the activated relics. As Jade watched a game show called, ""The International Island Challenge,"" the locater senses the next relic, which is the prize on the game show: the gourd containing the Water Demon's chi. Jade pleads Jackie to let them enter the contest held on Boru Island, but Jackie explains that this is a serious mission. However, on the set, the producer mistakes Jackie, Uncle, Jade, and Tohru as a competing family. They must face off against the Dusseldorf family, but they fail in the first task when Tohru falls off the bridge after being pelted by coconuts. However, it is Uncle who is voted out of the family, but he manages to stay on the island for the night after complaining about his supposed fear of flying. In the second round, neither family wins the bug-eating contest, so they must race in the tie-breaking round. When Jackie, Tohru, and Jade near the finish line, Drago appears, manages to obtain the Water Demon chi, and creates a tid

Jade's hopes of a birthday celebration are dashed when Drago's failed attempt at stealing the recovered two demon chis puts everyone on high alert at Section 13. The postponement of her birthday continues when two demons' chis, earth and moon, are activated within the same day. It is a race against time as Jackie, Uncle, Tohru, and Jade attempt to stop Drago, his new henchmen, Strikemaster Ice and his gang from acquiring the power of the two chis.

The Enforcers are released from prison and are required to finish off their sentence by doing community service. Jackie begins tailing them, watching their every move. They have become suspects in his investigation into the failed attempt by three unknown assailants to steal the valuable golden squid, which is being showcased at the museum. Meanwhile, Jade who quit the buttercup scouts due to sheer boredom has joined the dragon scouts in a quest for more adventure and excitement. Jade becomes very suspicious of three specific members of the scouts when she and Jackie discover that they are the nephews of the Enforcers. She begins following and watching them, hoping to catch the three kids doing something illegal.

After capturing the chi of Hsi Wu, the sky demon, Uncle attempts to place it in the chi containment unit. However it is broken, so the chi must remain in the chi-o-matic. Thinking that it is empty, Jade then takes Uncle's chi contraption with her on a school field trip to a haunted doorknob museum. Jade's teacher, Mrs. Hartman confiscates the chi-o-matic and accidentally infuses herself with Hsi Wu's chi. Things get worse in the haunted house when Drago appears and the ghosts get angry at the presence of two demons in their house.

Jackie and the gang visit the ancestral home of the Chans in China (now mostly underwater). There, they accidentally release three demon spirits that transform their bodies into the physical embodiment of their fears.

The Demon Chi briefly escapes from the Containment Unit. All of them are retrieved, except for the Earth Demon chi, which flees Section 13 and inhabits the body of one of Jades' Friends Larry (a comic book nerd, who also loves Super Moose) who proceeds to use his new demon powers for good as the superhero Spectacularry. Unfortunately he causes more problems than he solves. To prevent Draco obtaining the Earth demon Chi Jackie, Jade and Uncle Head to where any comic nerd with super powers would go, a comic fair. But the Demon Chi is slowly overwhelm Larry's good nature and with Drago closing in, Jackie, Jade and Uncle must save Larry before his super heroics destroy all around him.

Tchang Zu's demon chi is located in the ruins of the Titanic. Jackie, Jade, Tohru, and Uncle, ridden with the flu, journey into the murky depths of the wreck to find it, but Drago has followed them. Things aren't helped when Jackie suffers from being down in the cold water for too long and he loses all grip of his senses...