Based on popular cycle of novels by Elena Mikhalkova "Investigations of Makar Ilyushin and Sergey Babkin". Masha, the wife of Sergey Babkin, is invited to school reunion. Her schoolmate Sveta Rogozina organizes a "girl's night" in suburban pension. Masha is not very happy about this invitation: as most of her schoolmates she's got tough memories about her younger years. And the main reason is Sveta Rogozina, the prom queen. But curiosity wins childhood traumas, and ex schoolmates arrive to the pension. Everybody wants to see each other and to see Rogozina, who, according to social media, keeps living a luxurious life travelling and changing one rich husband after another. Few hours later the "girl's night" turns into real nest of vipers. It looks like these ladies came together just to drag out of nowhere all their teenage dramas and adult secrets. Storm clouds are gathering as before a thunderstorm, and thunder will hit - when one of them will be found dead in her room. And the main suspect will be Masha. This means that she would need the help of investigators Ilyushin and Babkin.
