Famous bohemian photographer disappears in Saint-Petersburg. Main character of the show, Anna Vorontsova, refuses to open a case, because she knows that the man in question vanished several times, always coming back in a few months with a serious hangover. However, things take a sudden turn and the photographer dies. Feeling guilty about what happened to him, Anna swears to figure the case out. Because she is unsocial and vinegary, her colleagues nicknamed her the Crow. Promising pianist in the past and now investigator for special cases, Anna always takes a creative approach and brings everything to an end.