Private Detective has fallen into the clutches of rogue agent Darla Crane. Agent Darla has learned all about the hapless detective she has cleavegagged and hogtied on her mattress. But before she can decide what her next step will be, the buxom redhead is startled by the sudden appearance of her old nemesis, Dr. Caesar Beringei! When she sees the mad scientist ape-man she immediately faints next to Melody. When we next see the busty duo they're seated side-by-side, ballgagged, secured in handcuffs and leg-irons and roped to their chairs. The simian villain then gloats over the topless beauties and basks in his moment of ultimate revenge, and he leaves Melody and Darla in dire peril. They moan and struggle against the metal restraints, but the minutes tick closer and closer to their doom, and they're still powerless to save themselves. Then as all looks completely lost, one of Agent Darla's other enemies appears. It's Paul, the inept agent who's plagued her before (and the villain who's nabbed Bunny Colby)! The helpless redhead manages to alert him to the imminent danger, and he stops the timer at the last second. But Detective Marks and Agent Darla are far from being saved!