Christabel Caine has the face of angel and the heart of a swamp rat. She'll step on anyone to get what she wants, including her own family. A master of manipulation, she covertly breaks off the engagement of her trusting cousin, Donna, to her fabulously wealthy beau, Curtis Carey. Once married to Curtis herself, Christabel continues her affair with novelist Nick Bradley, who knows she's evil, but loves her anyway.
A popular singer, Marian Washburn, suddenly and unexplainably loses her voice, causing a shake-up at the club where she works. Her worried but loyal piano player, Luke Jordan, helps to promote a new, younger singer, Susan Caldwell, to temporarily replace Marian. Susan finds some early acclaim but decides to leave the club after a few performances. Soon after Susan quits, she is gunned down, and Marian quickly becomes a suspect.
Bookkeeper Sam Wilson learns from his boss, Malcolm Jarvis, that he is losing his job because the company is closing down. Jarvis then makes a strange proposition, saying he intends to commit suicide but wants Sam to make it look like a murder, in order for his wife and son to inherit Jarvis's life insurance. Sam declines, but when he goes to see Jarvis and finds his dead body, he reluctantly goes along with the scheme.
