Troubled waters...Celebrated painter Troy Alleyn, aboard the Zodiac on a cruise of the English waterways, finds a colorful constellation of personalities on its passengers list. Plus one who missed the boat-found murdered in London. Her letters to her husband, Superintendent Roderick Alleyn, relate a string of incidents-capped by a grisly drowning-that convince him that one of the ship's company is a world-class art forger on the run. But can he unmask this master of disguise in time to save another life-possibly Troy's?