Mallory Estate is the last place twelve-year-old Piper Peavey wants to spend her summer vacation. The grounds are always cold, the garden out back is dead, a mysterious group of children call the property home, and there's a rumor that Melena M. Mallory—the owner of the estate and Piper's wealthy grandmother—is a witch. But when Piper's father falls ill, Mallory Estate is exactly where she finds herself. The grand house and its garden hold many secrets—some of which may even save her father—and Piper will need to believe in herself, her new friends, and magic if she wants to unlock them before it's too late.