Chris Emery, a talented nightclub singer and dancer in the vibrant British colony of Trinidad and Tobago, finds her life turned upside down after a tragic event. One evening, following her performance, she is approached by Inspector Smythe and Anderson, a representative from the American consulate, who deliver the shocking news that her husband, Neil, has been found dead. Grief-stricken but determined to uncover the truth, Chris receives comfort from Neil's close friend, Max Fabian.
Initially, the police believe Neil's death was a suicide, citing the presence of a gunshot wound and a pistol found at the scene. However, as their investigation progresses, they become convinced that Neil was murdered. Smythe and Anderson confide in Chris, revealing that Neil's boat was spotted near Fabian's property at the time of the incident. This raises suspicion, especially considering that Fabian is known to be involved in shady dealings, having amassed his wealth through trading sensitive information and aiding in treasonous activities. Further inquiries suggest that Neil’s murder may be linked to Fabian's latest dangerous scheme: planning to launch rockets from Trinidad supplied by Nazis to attack the United States.
Determined to help, Chris decides to use her position and her relationship with Fabian, knowing that he is infatuated with her, to extract crucial information for the police. Her plan is risky but necessary as she tries to manipulate Fabian's affection to her advantage.
Meanwhile, Neil's brother, Steve Emery, arrives in Trinidad after Neil writes to him about a promising job opportunity. Struggling to come to terms with Neil’s sudden death, Steve is devastated to learn that Neil had apparently committed suicide shortly after their correspondence. Still deeply affected, he begins his own investigation into Neil's death, determined to find the truth. As the process unfolds, Chris and Steve grow closer, and she begins to develop genuine feelings for him; however, she remains guarded, unable to reveal her true reasons for befriending Fabian.
The story takes a darker turn during a lavish party at Fabian’s estate. Steve recognizes Walters, a man he sat next to on his flight to Trinidad, and notices his suspicious behavior when the name of Neil is mentioned. Recognizing Walters as a threat, Fabian, seeing that Walters' research has been completed and that he could be a liability, orders him to be killed in a hit-and-run incident. This act casts a further shadow of suspicion over Fabian and heightens authorities' doubts about his involvement in criminal activities.
As Chris gets closer to uncovering Fabian’s secrets, Steve gathers concrete proof of the financier’s complicity in Neil’s murder. The climax unfolds dramatically as a confrontation erupts, leading to a tense struggle over a gun. During the chaos, Fabian is accidentally shot in the stomach. Recognizing that his wound might be fatal, he instructs his henchmen to escape with his secrets and leave him behind. The authorities, who have encircled the estate, quickly apprehend or kill Fabian’s accomplices.
In the final moments, Steve, acting in self-defense, eliminates Fabian in a fierce gunfight. With Fabian's plot exposed and justice served, Chris is cleared of any suspicion. The story concludes with them leaving Trinidad for Chicago, seeking a new beginning after unraveling the deadly conspiracy that threatened to ignite an international conflict.
