About the series
Chemistry teacher Rita, after a scandalous dismissal over an affair with a student, is left without means of support. But thanks to her skills, she manages to earn easy money cleaning a cottage — using household items, Rita prepares a "chemical cocktail" capable of washing away the traces of a loud party. However, it turns out that the cottage saw not only a party: a murder took place there. Now Rita finds herself at the epicenter of local gangsters' criminal dealings. But she herself is not so simple — all this time Rita has been living undercover under someone else's passport. A few years ago she already had to flee her native St. Petersburg for a seaside town to save her life. Because Rita is the only living carrier of a formula that her pursuers desperately need...