An intriguing letter containing a desperate cry for help scrawled in what seems to be blood mysteriously appears in a school bag belonging to a member of the 'super sleuths', a dynamic group of youthful investigators. The children embark on a perilous quest which takes them to the Gothic Cloggham Hall, a place riddled with numerous secret passageways and hidden rooms. A terrifying game of 'hide and seek' ensues, full of thrilling twists and turns, as the children seek to rescue the author of the letter whilst trying to evade the clutches of the Hall's monstrous villains, who unknown to them, have a diabolical plan which, if successful, will transform their lives forever! Can the sleuths effect a rescue in time, or will the forces of evil win the day?