Dancer Olga Polskaya almost died six months ago in the icy waters of the Velikaya River. And now she is an actress in a quest based on real events from her own life. Olga is a former client of the detective agency of Pavel Sinichkin and his assistant Rimma. The detectives decide to attend the show as spectators, but soon they have to question the actors in connection with a murder that happened right during the quest. All the evidence points to Olga, but detectives believe anyone could have killed the client. Including Yaroslav Dorofeev, who suffers from autism, who has long been hopelessly in love with a dancer...