Summer at Camp Widdershins promises to be lots of fun. Ten-year-old Gappy meets his cousins for the first time and is thrilled to make friends with kids who are vampires like himself. Together they learn some exciting magical skills, much to the envy of their human relatives. But Gappy's summer soon turns scary and mysterious when two men capture him in the middle of the night. Why would anyone want to kidnap Gappy, and will his brand new vampire powers be strong enough to help him escape?