The grown-ups all think she’s going to die soon – she can see it in their eyes. Still, when poor 12-year-old Stina is sent to Raspberry Hill Sanatorium she can’t believe her luck. She gets to ride in a real motor car to the hospital, which looks like a castle hidden deep in the forest. But as Stina explores her eerie new home, she begins to suspect that the building is concealing a dark secret. How did the old East Wing burn down? Why doesn’t her mother reply to any of her letters? And what are the nurses all so afraid of? Stina is determined to solve the mystery of Raspberry Hill – but as she edges closer to the truth, she finds herself in terrible danger.