A family arrives at their lakeside vacation home, seeking a tranquil retreat from city life. The parents, Georg and Anna, along with their son Schorschi and their dog, commence their holiday with a sense of peace and anticipation for rest and relaxation. Their idle serenity is soon disrupted by a knock at the door. Two young men, Peter and Paul, dressed in white, claim to be visiting from a neighbor's property. With a veneer of politeness, they charm their way inside, asking to borrow eggs.

The situation rapidly deteriorates as the young men's behavior becomes increasingly menacing. What starts as an odd, if uncomfortable, interaction, escalates into a nightmarish ordeal. The family is subjected to a series of sadistic games at the hands of their captors. As the extent of the intruders' intentions becomes clear, Georg and Anna realize they must fight to survive. The family's every attempt to resist or escape is met with cold, calculating resistance from Peter and Paul, who seem to derive pleasure from the psychological torment they inflict. The struggle between captives and captors unfolds in a setting starkly contrasting with the calm and beauty of their intended retreat.