Lily Gullick's obsessive birdwatching habit turns into a dangerous obsession when she witnesses a suspicious event across from her new home, leading to the death of her elderly neighbor. Lily, intrigued by the social dynamics of her gentrifying neighborhood, feels compelled to investigate the suspicious circumstances surrounding Jean's death. However, her interference draws unwanted attention, and as she uncovers the truth, her own life becomes endangered. The narrative questions the reliability of perception, particularly Lily's, as she navigates the increasingly precarious situation.

The book has been praised for its atmospheric reworking of classic suspense tropes, drawing comparisons to Hitchcock's 'Rear Window'. Critics have highlighted the author's skill in building suspense and creating an engaging narrative that keeps readers guessing. The exploration of social dynamics within a gentrifying neighborhood adds a layer of contemporary relevance to the thriller elements. Overall, the reception suggests a compelling and tightly plotted mystery that effectively utilizes its premise to deliver a thrilling reading experience.