|Barry Fitzgerald||Det. Lt. Dan Muldoon|
|Howard Duff||Frank Niles|
|Dorothy Hart||Ruth Morrison|
|Don Taylor||Det. Jimmy Halloran|
After a former model is drowned in her bathtub, Detective James Halloran (Don Taylor) and Lieutenant Dan Muldoon attempt to piece together her murder. A friend of the victim mentions ''Mr. Henderson,'' and the police also find the actions of Frank Niles peculiar. As Muldoon and Halloran start to fill in the details of the victim's past, they find that she had a lively social life, filled with many suitors, and the mystery becomes even more complex.