The Silverlock Sisters have been quite busy and Idris Hopper, the head of Rimor, feels the girls are due for some time off. Ruby, Emerald and Sapphire plan to make their most of their break and their faraway cousin, Gloria Burton, provides them a great opportunity to kick back, relax and have fun when she invites them to spend a week away with her family in the Scottish highlands! Karim Hopper is invited to join in, which suits Ruby just fine as she wants to explore what feelings she may have for him. But what was meant to be a holiday with family takes a sinister turn when Ruby falls into a river and gets swept away to the mysterious Thunder Manor. Is she safe there? Or does Thunder Manor hide a terrible secret that could claim her life...?