Olga did not expect anything good from the appearance of her ex-husband, because he left her with two children and forgot about their existence for years. And then her mother-in-law turns to her with a strange proposal - to take the position of commercial director of the oil company, which she and her son own together. What do they really need from Olga? The woman’s head completely went spinning when the heir to another oil kingdom, the main competitor of her former relatives, “accidentally” met her. Olga understands that if she does not urgently figure out what is happening, nine grams of lead in her heart may well await her.