Yara is an immigrated girl. Escaped from the horrors of the war, she finds herself in a refugee center. Here she will meet Lucas, with whom she will start a relationship. With the help of the social worker, Nadia, the couple, in economic difficulties, manage to find a temporary accommodation in a council house, unaware that the real horror will start as soon as they cross that door.

During a Halloween weekend, Carmen and Samuel decide to spend a few peaceful days in a secluded villa, but their getaway soon turns into a nightmare. Three mysterious masked youngsters show up at the door with the classic question, "Trick or treat?", kicking off a cruel and terrifying game.