Although they are only janitors at a detective agency, the boys pass themselves off as sleuths and are engaged to guard an inventor delivering a new bomb. They outwit enemy agents after the bomb and wind up sinking a Japanese submarine. 　　译文(2): 虽然他们只是一家侦探事务所的看门人，但这两个男孩冒充侦探，负责保护一位投放新型炸弹的发明者。他们在炸弹爆炸后智取了敌方特工，最终击沉了一艘日本潜艇。