An eleven-year-old in Regency England, Jemima can hardly contain her excitement when she learns that Cousin Aimee is coming for an extended visit. However, Aimee turns out to be a different sort of girl than Jemima expected. Disdainful and rude but oh-so-accomplished, Aimee certainly doesn't want Jemima to be her friend... and Jemima doesn't want to spend any more time with Aimee than she must To make things worse, when household items start to go missing, including Reverend Sudbury's heirloom cufflinks, Aimee accuses the Sudburies' faithful servant Robert of theft. Secret searches, overheard conversations, and night adventures lead to a solution to this mystery story in which Jemima learns that Jesus can give her the power to love her enemies and to do good to those who have done evil."