Sisters Sabrina and Daphne Grimm are sent to live with their mysterious grandmother, Relda Grimm, in the strange town of Ferryport Landing. They soon discover they're descendants of the famous Brothers Grimm and are destined to be fairy-tale detectives, keeping the Everafters (fairy-tale characters living in secret) in check. When a giant terrorizes the town, the skeptical sisters must embrace their family legacy and solve their first magical case, learning that fairy tales are not only real but dangerous.