The Catman of Paris is a 1946 horror film from Republic Pictures. French author Charles Regnier (Carl Esmond) has just returned to Paris following a trip to the Orient. His latest book concerning the trial of an infamous "catman" murderer has brought him wealth and renown, but has also aroused the ire of his government. When a librarian carrying documents linking Regnier to a conspiracy against the government is found clawed to death, the police look to Regnier as the main suspect. More and more such murders turn up around Regnier, who has lately experienced frequent memory lapses and disturbing visions of cats in the night. Even he believes that he has become some sort of monster. The police, Regnier's friends, and Parisian society at large are torn whether or not to accept the possibility of a were-cat among them. Soon everyone will discover the truth the night an ominous figure stalks Regnier's mistress.