Plot synopsis: The life of the main character Maria, a talented scientist-pharmacist, abruptly changes the chain of mysterious events. First, the husband goes missing, and then the murders begin in the city. Three weeks later, the heroine finds her husband, but, alas, it is not so pleased with her — she recognizes a loved one in the sketch of a homicidal maniac. Despite the support of friends, Mary is on the verge of despair…