Karim and Lena know better not to cross the moors, even though it is a shortcut, because it is commonly known that those moors are haunted by witches. Somewhere deep inside the Haunted Moors a dark secret is hidden. But Karim and Lena want to know what happened to their classmate Rennie, who disappeared so suddenly last summer. What is the truth about the white witch and what happened at the old water mill in ancient times? Who is the lady with the long, white hair and blank eyes and why is she calling so desperately for Lena? Then, one day, a fearsome face appears in the water, lights hover above the moors at night, and Karim and Lena are about to receive a whole lot more answers than they bargained for