The absurd, mysterious death of student Masha Gavrilova shocked her friends. Friends, relatives, teachers, neighbors - everyone is perplexed. Who could use a girl who is positive in all respects? She studied with excellent marks, had no dubious connections, was smart, beautiful... What if one of Masha’s acquaintances was just acting out grief? Private detective Tatyana Ivanova has some suspicions about this. However, the killer is too confident in his impunity and disguised himself very well...