In the stage, there is a painting of devils. Devils that are sinister looking. They will come alive if one of the guests broke a taboo.
The theater was a cursed place. It's easy to come in but impossible to get out. This storyboard of his depicted gore and cruelty. One of the group broke the taboo.
She accidentally tore the painting. She was surprised at first and was scared. But her friends comforted her. They even tore the whole painting together. Saying its conspicuous and ugly. In such a theater stage, this ugly painting was clearly out of place.
But what they did not know is they have broke the taboo.
In that very night, the devils have stepped inside the theater. And hunted the group of young people.