Black comedy. Mild-mannered dentist Frank Sangster is engaged to a prim and delicate hygenist, Jean. He leads a placid, upper-middle-class existence, save for the occasional visit from his deadbeat artist brother Harlan. But Sangster finds his life turned inside out when the alluring Susan enters his life. Complaining about her molars, she's really more interested in his refrigerator of narcotics. Dark deeds and dead bodies follow.