A young mother with two small daughters goes to a secluded forest house by the lake to spend a weekend in nature. By the evening the family is waiting for the arrival of her husband and father, and while the girls are walking in the woods and find a table with cakes. But with the onset of twilight appears unknown in the mask, which begins to terrorize the mother and children. Maniac psychopath has planned a sophisticated trap and is now trying to break into the house to kill a woman and girls.