The film begins with a sleepover of children. They prank call people while playing the game Seventy Five. Meanwhile, their parents are in the other room having drinks. The rules of the game are that you must keep a random person on the line for 75 seconds, and they must believe what you’re saying. As the night goes on, the kids go to bed, and a man whom the kids recently called calls back, before jumping from a closet and killing all the parents in the house with an axe as the children hide in their bedrooms.