Aggie, her widowed mother, Grannie Jane, and Aggie's friend Hector travel to a spa in Yorkshire. There is even a potential new friend in George, a young patient at the spa. Aggie is looking forward to having more grand adventures with Hector. But rumors surface about the spa's recently deceased former patient, and then another body appears under strange circumstances. Aggie and Hector must put their deductive skills to use to determine whether the people have been murdered.