During a lovers' quarrel Dandy Arthur kills his ex-girlfriend. Unfortunately, a button torn from her coats lands in his pocket during the struggle. His wife finds the button and Dandy sets out to kill her as well. Eventually, however, Dandy gives himself away by talking too much and is arrested by the police.

Une femme, Betty Rose Calder est assassinée par Arthur, un ancien amant qui a changé de vie et qui partage désormais la sienne avec la douce Mickey. Mais un jour, la jeune femme retrouve le bouton de son mari sur les lieux du drame. Elle commence à le soupçonner de meurtre quand toutes les preuves l'accablent.