A series of suspicious deaths has rocked Hull, a port city in England as old and mysterious as its bordering sea. In the middle of a Christmas service, a teenage girl adopted from Sierra Leone is chopped down with a machete in front of the entire congregation. A retired trawlerman is found dead at the scene of a tragedy he escaped, the only survivor, forty years ago. An ugly fire rages in a working-class neighborhood, and when the flames die away, a body is discovered, burned beyond recognition.            Detective Sergeant Aector McAvoy is sure there is a connection between these crimes, but his fellow officers are not convinced—they would rather get a quick arrest than bother themselves with finding the true killer.