Author Charles Regnier returns to 1896 Paris after exotic travels, having written a bestseller which the Ministry of Justice would like to ban. That very night, an official is killed on the dark streets…clawed to death! The Prefect of Police suspects some type of “were-cat”, but Inspector Severen thinks there is nothing supernatural about Regnier’s motive. Regnier begins to doubt himself when he has another hallucinatory blackout during the second killing. Who is the infamous Catman of Paris?