Monkey King battles the hero Ne Zha for a map that will lead to a weapon strong enough to defeat the Lady Bone Demon. With MK in peril, Monkey King uses the last of his strength to get back, but not before MK loses his powers. Now, MK, Monkey King, and the other heroes are on the run, pursued by the Macaque! Without his powers, MK must make a tough choice in order to defeat the villain!

When the heroes' drone crashes in the ocean, they are captured by the Dragon of the East, Mei's distant uncle! Furious with Monkey King for stealing the staff eons ago, he confiscates the map and imprisons the heroes... all except Mei! Now it's up to her to retake the map and save her friends before Macaque catches up to them!

The heroes drive across a vast desert, headed for the first location on the map. When their van breaks down, the team is stranded until they find an Oasis owned by the crafty Goldfish Demon! He offers to let them try and win whatever they need in his game show. MK, desperate to prove he can be the 'smart one' now he has no powers, agrees to play. Problem is, he's not the smart one!

After a pitstop, the heroes get back on the road. Strangely, MK notices they're headed East, not West! Something's wrong! We soon learn Macaque has tricked them and is bringing MK back to Lady Bone Demon. Meanwhile, Pigsy, Mr Tang, and Monkey King realise they've been separated from the others, but before they can go looking for them, they are attacked by a horrifying demon!

When a demon attacks, Tang and Pigsy know their only choice is to wake Monkey King from his mystic meditation. Monkey King scares off the demon, but now thinks he's his younger self! When the demon kidnaps Tang, it's up to Pigsy and Young Monkey King to rescue their friend. Meanwhile, Tang wakes up in the castle of a beautiful Queen who 'rescued him from the demon'. Tang isn't buying it...

MK, Mei and Sandy find themselves stranded in the desert, but a familiar figure emerges to save them: Red Son is back! Bringing the trio to his family's fortress, the heroes overstay their welcome with the villainous trio as they try to find out everything they can about the creation of the Samadhi Fire... and soon realize that the first ring is here, in Demon Bull King's nose!

Watching Pigsy's favourite cooking show, "Cooking with Chang'e", MK realises the second ring of Samadhi is there in her kitchen... On the moon! Soon, Pigsy, MK and the Monkey King are flying to the moon in a rocket! Making their way through Chang'e's solar base, they need to avoid Chang'e's killer bunny mechs and make it to the kitchen! However, getting out is going to be even harder than getting in!

The heroes arrive at the last stop on the map: Lantern City! But to get the final ring, they'll need to compete in a talent show! Stuck as band manager, Tang doesn't want to just sit around and wait. He's going to find the ring himself! Unfortunately, he's leading the Macaque right to it! To everyone's surprise, Tang stands up to Macaque, tapping into a power he didn't know existed...

Now with all three rings, the heroes ask Monkey King 'what's next?' But before he can answer, Ne Zha arrives, hunting them down. While Monkey King holds Ne Zha off, MK and the heroes must get the rings to a mystic mountain where they can reforge the fire. However, when Macaque arrives, now supercharged with Bone Demon power, things go from bad to worse.

Now that the ritual has been started, it can't be stopped. Worse, something is happening to Mei! Ancient secrets are revealed as Monkey King finally tells the heroes the truth: there is a fourth ring! All of the Samadhi Fire is absorbed into Mei, and there are now two unstoppable forces for the heroes to contend with. The Monkie Kid team is pushed to breaking point, and nothing will be the same!

With the heroes' team in disarray, MK and Ne Zha try desperately to stop the Monkey King from confronting the Lady Bone Demon on his own, while Mei learns how to control the Samadhi Fire with Red Son. When MK catches up to the Monkey King, it seems that his mentor might actually stand a chance of defeating her!

The Lady Bone Demon successfully overcomes the Monkey King and now has the perfect champion to complete her 'destiny'. MK reunites with Mei and Red Son, but before they can come up with a plan, the corrupted Monkey King arrives to take Mei and the Samadhi Fire to his new master! Now MK and the heroes will need to fight their strongest opponent ever!

With the Monkey King under Lady Bone Demon's control and Mei imprisoned in her tower, MK and other heroes formulate a plan to rescue their friends and save the world. With help from Macaque, new information from a depowered Mayor, and the Lady Bone Demon's power stretch thin, this is their last chance to stop Lady Bone Demon!

The final battle between the heroes and Lady Bone Demon has begun. MK must save his mentor from her control and stop her before she can release the Samadhi Fire and destroy the world! When all our heroes embrace their own destinies, the ultimate fight is on. Working together, they have one shot at defeating their ultimate enemy once and for all!