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Rita, a fragile-looking chemistry teacher, remains out of work for having connections with a student. But thanks to her skills, she manages to earn easy money by cleaning the cottage. However, this cottage turns out to be a crime scene, and Rita herself finds herself in the epicenter of criminal showdowns by local bandits. However, Rita is not so simple — all this time she has been living undercover on someone else's passport. A few years ago, she already had to flee from her native St. Petersburg to a seaside town to save her life. After all, Rita is the only living carrier of the formula that her pursuers really need.