The story opens on a bright May morning in Chelsea, where Philip Esdaile, a newly made Associate of the Royal Academy, is giving a farewell breakfast for his friends before leaving for Santon. The party is lighthearted, celebrating his success, the return of his early paintings, and an upcoming wedding. This cheerful gathering is abruptly shattered when an aeroplane crashes onto the studio roof, leaving one aviator dead and another injured.
As the police and onlookers crowd the street, Esdaile behaves strangely, returning from the cellar with a lit candle and ajar of liqueur, seemingly oblivious to the disaster overhead. Meanwhile, Monty Rooke retrieves a discarded pistol from the roof and hides it. As friends try to piece together the events, it becomes clear that Esdaile and Commander Hubbard recognize the surviving aviator, Chummy Smith. Soon, unsettling secrets begin to accumulate. A bullet turns up in a neighbor's window, the police grow suspicious, and Esdaile's evasiveness puts him at odds with those closest to him, including his wife Mollie and young ward Joan Merrow.
The narrative shifts between London and the windswept Yorkshire coast, where Joan waits anxiously for news, completely unaware of the dark implications of the crash. Back in Chelsea, the tension mounts as professional obligations and personal loyalties collide. A coroner's inquest narrowly avoids a deeper scandal, thanks to a barrister friend who acts as foreman, but gossip spreads through the neighborhood. The psychological strain fractures relationships, leading to broken engagements and a pervasive sense of unease.
Ultimately, the book explores the moral burden of protecting a friend against the demands of the law and public scrutiny. It reveals how an extraordinary event exposes the fragile foundations of everyday lives, forcing characters to confront their deepest fears and loyalties. Without offering easy resolutions, the narrative leaves a lingering sense of the complexity hidden beneath calm surfaces.