Murder on a Honeymoon

On a short flight to Catalina Island, Roswell T. Forrest falls ill. When the plane lands, Forrest is found dead and Hildegarde Withers suspects murder. Local police chief Britt and coroner Dr. O'Rourke are skeptical, setting the stage for a tricky investigation.

Withers argues that poisoning could explain the death, pointing to possible tampering with a drink, a cigarette, or smelling salts. Britt and O'Rourke push back, wanting more evidence before declaring murder. The dispute establishes the tension between suspicion and official inquiry.

Withers contacts her friend Inspector Oscar Piper in New York, who recognizes Forrest as a key witness with a price on his head. He flies from New York to Catalina to help investigate and protect Withers from mob retaliation. His arrival shifts the investigation from suspicion to coordinated action.

Upon Piper's arrival, Withers and Piper disagree over who among the plane's passengers is the killer. Withers points to poisoning as a likely method, while Piper weighs multiple suspects and motives. The debate exposes cracks in their working relationship but advances the case.

Before the poisoning theory can be confirmed, Forrest's body is stolen from the scene. Withers and Piper scramble to locate the corpse and question those aboard, realizing the case is more tangled than expected. The theft heightens the sense that someone on the plane is willing to hide the truth.

Withers overhears McArthur, the gangster offering the reward, speaking under the fake name Arthur Mack at the hotel. She rifles through the mailbox and finds an envelope containing $10,000, hinting at a payoff behind the murder. The discovery adds a tangible motive and a dangerous ally to the mix.

Marvin Deving is shot just before he can tell Piper what he knows, cutting off potentially critical information. His death suggests a concerted effort to silence witnesses tied to the crime syndicate. The room grows tenser as the web of loyalties tightens.

Withers and Piper learn that Forrest's supposed first victim was really his bodyguard Tom Kelsey, and that Forrest and Kelsey had swapped identities. The revelation rewrites the trajectory of the case and clarifies why the initial corpse seemed to belong to Forrest. It also raises the stakes for understanding who is truly in danger.

McArthur confronts Withers at gunpoint, trussing her up and locking her in a closet. Piper arrives and frees her, turning the tables on the mobster. The dramatic standoff exposes McArthur's ruthlessness but leaves several questions unanswered.

McArthur is found dead, and the scene appears to be suicide, though Withers notes the pistol isn't his. The apparent ending masks a more complex conspiracy and deepens the mystery surrounding the reward money. The investigators push toward a final reckoning.

An employee reports the hotel pond's fish are dead, a clue pointing to a poison method. Withers finds a discarded cigarette nearby, and one of the cigarettes had fallen into the water, poisoning the fish. The cigarette becomes a crucial link in identifying the murder weapon and the killer.

Withers and Piper bring in Kay, Forrest's grieving widow, who hesitates to smoke but reveals that McArthur's gun is in the room. Kay attempts to shoot, but Withers distracts her and Piper disarms the weapon. The moment reveals the volatile mix of revenge and survival among the suspects.

The truth comes out: the Devings believed they would be rewarded for the murder, but Withers had already taken the $10,000. Marvin Deving tried to betray McArthur and was killed by his employer, and Kay then killed McArthur to finish the scheme. The case resolves as the conspiracy unravels and the killers are exposed.