Newlyweds Pavel and Vesta go on a honeymoon on a snow-white yacht. There is no one around, only the sea and seagulls. An ideal place for love and... murder. Pavel decided to end his life with his wife as soon as he learned about the rich inheritance that had fallen on her. But how can you take a person’s life without too much fuss? Crack your skull with a bottle? Or just push it overboard? While he was thinking about these terrible things, Vesta was preparing for the most important mission of her life - the search for a non-existent eighth note. For this purpose, she collected an outlandish musical instrument on the deck, in large glass flasks of which the corpses of people were decomposing, and only one flask was empty. For it was intended for Paul...