The mysterious story of a young girl Pavla, who mysteriously disappeared from her mother five years ago, takes place in the dark corners of the Bratislava port. The girl was kidnapped by the hypnotist Lascani, who performs in a variety show and has just arrived in Pavla's hometown on his travels. He completely controls his victim and Pavla doesn't remember anything. She has to act as his "medium" with Lascani and even has to be his lover. However, a young boatman, Franta, falls in love with the girl and tries to free her...