Luisa has a habit of bringing her dates home, irritating her son, Cesar. When Cesar invites his best friend Pablo over for a sleepover, Luisa's flirtations become too much to bear, especially as Cesar has his own feelings towards Pablo.
When their mother is hospitalized in a car accident, Pim and Putt suddenly discover that they have a set of grandparents they've never known about. But a terrifying truth has long been hidden within the walls of their grandparents’ house, a truth that gradually reveals itself to Pim and Putt through a mystical hole, unleashing hair-raising horror on their family.