Frank and Joe Hardy must uncover the identity of a saboteur threatening a critical space mission at Cape Canaveral. The brothers arrive at the launch site to find high-stakes tension and a series of technical failures that point toward intentional interference. They navigate the complex security protocols of the aerospace facility while attempting to identify a culprit hidden among the scientists and staff. The narrative follows the brothers' investigative process as they gather clues and dodge danger in a race against the countdown clock.

This entry in the long-running series maintains the established formula of the Hardy Boys franchise by placing the protagonists in a specialized, high-pressure environment. The narrative relies on the familiar dynamic between Frank and Joe as they navigate the technical and social complexities of their investigation. Readers familiar with the series will recognize the consistent tone and the focus on deductive reasoning within a contained setting. The story functions as a standard procedural mystery that emphasizes the brothers' ability to solve crimes in diverse professional landscapes.