Investigator Sergei Smirnov, must return to the city of his childhood to investigate some high-profile murders. In Crystal city, there is a maniacal pedophile on the loose. Not only does he torture and kill children, he does it in a devious, brutal way. Sergei is the best in his field, so he entrusted with the investigation. Sergei has a complex character; the hero has obviously been through a lot, and his most terrible secrets are buried here, in Crystal city, where Sergei was born and raised.

• Anton Vasilyev
• Nikolay Shrayber
• Ekaterina Olkina
• Karina Razumovskaya
• Darya Ekamasova
• Sergey Gilev
• Vladimir Vinogradov
• Andrey Kurnosov