Pyshechka Olesya Permyakova really wants to lose weight: neither diets nor sports help, and Olesya is very afraid that a guy will leave her because of her excess weight. Tamara Petrovna finds out that Olesya has been tipped off - that's why she eats and can't get enough. It turns out that her colleague, her friend, and even the guy had a motive to harm the girl, but only the one whom Olesya would never have suspected... Meanwhile, Valera Ivanov also dreams of a slim, toned body - he even brought a treadmill he bought with his hands. However, Darina is not happy about this at all, because her husband promised to buy something for her for the award! The Ivanovs make a bet: the track will remain if Valera runs a marathon distance on it by the end of the week. Valera is ready for the race, but every day the runner is overtaken by laziness...