DBK's family's found a mysterious power source that will allow the brute to reclaim his former glory. But the strange item is locked behind an impervious ancient gate that needs a key... the same key that was given to MK as a 'thank you' for saving the city over and over. Now, it's a game of cat and mouse as DBK's family tries to get the key and our heroes attempt to keep it out of their hands.

Our heroes attend a shadow play, secretly run by the Macaque. Using a magical lantern, he imprisons the other heroes to toy with MK. MK feels a strong connection to the play, about a Warrior abandoned by his Hero. When Macaque finally reveals himself, he torments MK for not realising his friends were missing. Macaque declares he will be MK's teacher, even if MK doesn't want him to be.

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!