A young, beautiful and successful woman, Karina, has an enviable husband, a strong ten-year marriage, money and a job she loves. However, despite the happy shell, inside her life is empty and monotonous. In search of herself, she decides to open her own business, and by a lucky chance, “business shark” Galina Perova sells her a trawler at a low price. However, the purchase and sale agreement imposed a curious condition on Karina, closely connected with the old family house of the Perov family. And what awaits her in this mansion? Maybe money, new friends and new love? Or maybe an enemy lurking in the night and watching from around the corner? In any case, Karina will face a life-and-death struggle. But who is her enemy? Maybe she herself?..