In an attempt to show involvement in the community, Inspector Mallory joins the Kembleford Bowls Club. Christina Worcester, the Club Secretary, introduces Mallory to the local players, Roger, Shirley and Christina's husband Eric. Alec Frobisher strolls onto the green, where Shirley, much to Roger's disappointment, takes an immediate shine to his charming brother. Mallory sits himself at the side of the green, where Father Brown and Bunty later find him snoozing under a book. As bowls players convene, Shirley appears from the back of the clubhouse in tears and an almighty scream jolts Mallory from his sleep. Alec is found with his neck garrotted and as Mallory is technically a suspect, a new Inspector arrives to investigate. But for Father Brown, is it better the devil you know?