Student Ivan Kharitonov wants to become a doctor in the future. He has problems with excess weight and tries various methods to lose weight, which is why he goes to clinical trials of weight loss drugs. There, the hero spends seven days and meets the daughter of a prestigious medical oligarch, Margo. However, during this time, the girl's father dies. After that, Margo is accused of drug trafficking and finds out that she is pregnant. The girl's life rapidly goes downhill, while Ivan continues his studies and offers his friend a new diet method, which eventually proves successful…