When Robert Crane is charged with the murder of his sister's estranged husband Perry needs the testimony of sister Helen Reed to clear him of the charge. Unfortunately for all concerned, Helen suffers from multiple personality disorder and the second personality, Joyce Martel, is the one who is needed as the witness. Helen's psychiatrist puts her under hypnosis so Joyce can tell what she knows about the case.

Stefan Riker has come from Germany seeking the woman posing as Lisa Bannister and she believes he can cause her to be deported back to Germany. Attempting to help her stepmother, Doris Bannister pretends to be romantically interested in Stefan Riker. During the next few months Stefan Riker receives money and gifts from Doris and seems satisfied. However one night he is murdered and Doris Bannister is accused of murder because her fingerprints are found on a ladder outside of Riker's apartment.