Miss Mary Morstan contacts Sherlock Holmes for his help regarding her father, captain Morstan, who disappeared 10 years ago. Since his disappearance she annually receives a valuable pearl by post fr...

根据路易莎·古尔德（Louisa Gould）的真实故事改编。二战期间，位于英吉利海峡的泽西群岛（Jersey）是纳粹德国唯一占领的英国领土，希特勒命令不在岛上出生的英国家庭均被流放德国，而欧洲大陆的战俘则被带到该岛强制劳动。路易莎作为岛上居民，战争中拯救了出逃的俄国战俘。尽管在得知战争中英国不会冒险优先夺回该岛后，岛上的居民在饥饿和恐惧中变得日益焦躁，但路易莎依然不改初心，保护自己拯救的俄国男孩...