A mysterious murder takes place in the hometown of Moscow journalist Lana. Her long-time friend Svetlana died - an eccentric person who always imitated a more successful girlfriend. The mysterious messages left by the deceased force Lana to start her own investigation: it seems that Lana's beloved man was involved in the death of her friend - the special forces soldier Valera who disappeared five years ago, who was nicknamed the Dragonfly. The desire to justify Valera and dispel her own suspicions brings Lana to trouble - someone who remains in the shadows is clearly trying to let her know - she will follow Sveta if she does not get out of the city. Based on the novel of the same name by Tatyana Polyakova.