Monkie Kid (2020)

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.