After a terrible accident, Polina Lavrova miraculously survived, but completely lost her sight. It was necessary to relearn the simplest things: to walk without bumping into objects, to navigate in space, not to be afraid of the pitch darkness with which she was destined to live from now on... And a year later, Polina even decided to return to work in her own detective agency. She immediately came across a very strange client. Maxim Danilov claimed that he had killed a man, but Polina could not find any traces of the crime committed, but she pulled the end of a thread that promised a very interesting investigation...