After sixteen-year-old Harriet Flynn trips over an ancient gravestone etched with strange markings in a seventeenth-century holiday village and reads the inscription, she and her friends are alarmed to wake up with supernatural powers.Having magical abilities is fun at first, but when a series of accidents cause the group to become frightened, Harriet becomes determined to find out what s going on. While investigating the history of the gravestone they came across that night, Harriet realises she has unwittingly awakened a centuries-old, deadly curse and she is the only one who can put an end to it and she has less than a day.With time running out, Harriet must find the true magic key, to save herself and the ones she loves.