A mother moves into a new house with her two children. One night she must leave the siblings home alone. What begins as a blast of carefree play soon turns into a claustrophobic horror story.

A highly imaginative 10-year-old boy befriends his superhero-themed piñata prior to his birthday party. But upon realizing the tragic fate that awaits for his cardboard companion, he must rebel against the celebratory ritual in order to save his only friend.