When a small-time gambler is found murdered in a seedy pub, Chief Superintendent Henry Tibbett uncovers a link to a high-stakes international border dispute. Henry and his wife, Emmy, must navigate a complex web of clues that stretches from the English countryside to the waterways of the Netherlands. As they track a ruthless killer, the pair faces the pressure of preventing a global political crisis. The narrative follows the classic procedural framework, utilizing Henry's sharp investigative instincts and Emmy's practical support to dismantle the perpetrator's elaborate cover.

This work is characteristic of the mid-century British mystery tradition, emphasizing the intellectual puzzle over visceral action. The narrative relies on the established rapport between Henry and Emmy Tibbett, a pairing that provides both domestic stability and investigative synergy. Readers often appreciate the blend of low-stakes local crime and high-stakes international tension, which keeps the plot momentum steady. The setting of the Dutch countryside serves as a distinct backdrop that adds a layer of atmospheric detail to the procedural elements. The book maintains a consistent tone that aligns with the expectations of fans of traditional, character-driven detective fiction.