Detektyvna ahentsiya «Kassiopeya» v tsentri skandalu – cherez mistychnyy rytual na YAnsena Storozhenka polyuyut′ usi shpyhuny YEvropy. Vatazhky el′fiys′kych klaniv konkuruyut′ z YAnsenom, bo toy stav opikunom yunoyi Sirinhy, maybutn′oyi provydytsi, kotru el′fy ne ladni viddaty lyudyam. I dopoky Storozhenko zi svoyeyu druzhynoyu shukayut′ chashu Saturna, temnymy vulytsyamy chodyt′ mstyvyy himer-ubyvtsya. Kyyiv XIX stolittya – nebezpechne misto.