The action takes place at Kharkiv University of the Ministry of Internal Affairs. Cadets constantly get into some funny situations, fall in love, quarrel, reconcile. In short, student life is in full swing. But at the same time they are watched closely by the curator of the course of Ensign Polovinka. He, not having his own family, spends all his time and energy on raising cadets. Sometimes he bends the stick a little, which leads to curiosities.