An evil Mermaid falls in love with Marina's fiancé Roman and aims to keep him away from Marina in her Kingdom of Death under water. The Mermaid is a young woman who drowned a few centuries ago. Marina only has one week to overcome her fear of the dark water, to remain human in the deathly fight with the monsters and not to become one herself.

Leningrad, one summer in the early eighties. Smuggling LP’s by Lou Reed and David Bowie, the underground rock scene is boiling ahead of the Perestroika. Mike and his beautiful wife Natasha meet with young Viktor Tsoï. Together with friends, they will change the destiny of rock’n’roll in the Soviet Union.