The film is based on extremely romantic and dreamy stories of original sin. Joseph (Karel Novak) and Eve (Jitka Nova á kova) live happily in the rural suburbs, and their harmony is broken by an outsider. Robert (Jan Schmid), a man in red, prowls around the two, peeping at Eve's every move. Eve rejected Robert thousands of miles away. The letter from the postman to Joseph made Eve uneasy and jealous. She began to watch Robert, peep at him flirting with all kinds of women, moved, tried to seduce, but was refused by Robert. While Robert was having fun with a group of men and women, Eve sneaked into Robert's house, pulled out the red briefcase and printed the number "6" on her leg with the red stamp inside. The men and women on the beach learned from the newspaper that a murderer killed the woman and printed the red number "6" on her forehead.