Marple is extremely proud when she is appointed to the board of trustees of a merchant marine training vessel whose mission is to rehabilitate young criminals.[ZiYuantun.Com] As in all of her endeavors, Miss Marple intends to take an active role in the job and even shows up to the board meeting dressed in naval blues. When a fellow trustee is poisoned just prior to his making some kind of revelation, Miss Marple decides to use her position to spend time on the ship. This upsets the vessel's fragile social network as she dispossesses blustering Captain Rhumstone from his quarters. When two ship's officers are later found murdered also, Miss Marple enlists help from her friend Jim Stringer and Inspector Craddock to expose the murderer. 译文(2): 当马普尔被任命为一艘商船训练船的董事会时，她感到非常自豪，这艘船的使命是改造年轻的罪{资源屯-ziyuantun.com}。正如她所有的努力一样，马普尔小姐打算在这项工作中扮演一个积极的角色，甚至穿着海军蓝出席董事会会议。当一个受托人在他说出真相之前被下毒时，马普尔小姐决定利用她的职位在船上待一段时间。这扰乱了这艘船脆弱的社交网络，因为她把咆哮的雷姆斯通船长赶出了他的船舱。当两名船员后来被发现也被谋杀时，马普尔小姐向她的朋友吉姆 · 斯特林格和克拉多克探长寻求帮助，以揭露凶手。
