The gang get stuck in the mountains, and seek lodging at the Burlington Library, where its caretaker Dan Fluunk introduces the mansion’s history and the fascination of groups of four mystery solvers and an animal. As the night continues, the gang begin seeing strange and haunting things. Velma realizes the hallucinations are caused by the smoke of a special kind of wood. They capture the wood-burning fiend, revealed to be Fluunk. He reveals that he hates being the library’s caretaker, and schemed to use the smoke to scare visitors away and force the library to close. As the gang leaves, a book containing information on the disk is thrown from the window. Elsewhere, Cassidy searches for information on mystery solving groups.