A rookie detective assigned to the murder-by-strangIing cases of two young women. The onIy clue he has is that the kiIIer is always heard softIy singing a current hit tune before he strikes. The evidence soon points to the weII-known singer who has numerous dark secrets and is surrounded by other furtive types incIuding his scar-faced manager, a beautiful ingenue, and a former-crook-turned-composer among others.