Tom and Liz are excited about Casa Loma, a castle in the heart of Toronto - a mystery to solve and treasure to find. Sir Nigel Brampton, millionaire owner, disappeared and the police believe him kidnapped by thieves. Who is behind Sir Nigel's disappearance? Smythe, the butler? Irene, the maid? The sinister blacksmith in the stables? There are plenty of suspects to keep readers guessing through this fast-paced thriller.