Nina Foch plays the title role in this horror melodrama from Columbia Pictures. Investigating his father's murder Bob Morris (Stephen Crane) and his Transylvanian girlfriend Elsa (Osa Massen) come to suspect the mysterious Celeste Latour (Foch), who calls herself a Gypsy princess. And, sure enough, when Elsa gets to close to the truth, Celeste casts a spell on her that turns the girl into a cat. But only briefly and Celeste is eventually cornered in the Latour family crypt.