The events of the series "Shvabra" revolve around Anna Shvabrina, a simple school math teacher. She is a talented scientist with unique abilities and has been proving complex theorems since childhood. However, her personal life has always been a mess. One day, she discovers her beloved partner's infidelity. Before Anna can recover from this blow, she mistakenly ends up in prison. Using her mathematical thinking and logic, she proves her innocence. Her gift catches the attention of investigator Vershinin.