A routine evening for travel courier Sue Hammond is shattered when a bloodied stranger crashes onto her balcony, pulling her into a high-stakes web of danger. Sue finds her predictable life upended as she attempts to assist Bill Smith, a salesman whose mundane profession masks a perilous reality. As the two become entangled, they must navigate a series of threats that transform Sue's professional travel duties into a desperate struggle for survival. The narrative maintains a brisk, suspenseful pace, utilizing a third-person perspective to track the escalating tension between the protagonists and their unseen pursuers.

Andrew Garve, a pseudonym for the prolific journalist Paul Winterton, is recognized for his ability to craft tight, logical thrillers that emphasize the vulnerability of ordinary people. The premise suggests a classic mid-century suspense structure where the protagonist is thrust into a situation far beyond their experience. Readers of the genre often appreciate Garve's grounded approach to danger, which avoids excessive melodrama in favor of steady, mounting pressure. The narrative likely relies on the contrast between Sue's mundane travel career and the sudden intrusion of violence to drive the reader's engagement throughout the story.