It should have been a peaceful and beautiful morning. George (Ulrich Mühe) and his wife Ann (Susanne Lothar) took their son to the cottage by the lake for vacation. George and his son went to the lake to tidy up the sailboat to be used later, while Ann placed daily necessities in the kitchen. A sharp doorbell broke all the tranquility. The visitor was a young man who looked polite. He called himself Pete (Frank Giering). He came to disturb her to borrow an egg. Pete's proper appearance won Ann's trust, but what happened next surprised Ann. At this time, a man named Paul (Arno Frisch), who looked like Pete, knocked on Ann's door, and George came home with his son. The actors are all here, and the family of three can't imagine that what is waiting for them will be the unmotivated, merciless, and irrational abuse from these two white demons.