A boy named Luca works at a Halloween store called 'Beam Halloween.' While working a shift one day he has a urgent need to pee so he rushes to the bathroom. Using the urinal he suddenly falls through the bathroom tiles only yo find himself in a completely unknown location. He has unknowingly entered into the endless rooms. No one has ever made it out of this place, will Luca find a way to make it out? Or will the creatures who live in the walls get to him first?