Dinosaur Haunt begins when a Rottweiler tries to bury a skeleton arm in young William, 12, and 11-year-old Garret?s yard. They go to an abandoned house and find a skeleton chained in the basement, a crypt with coffins, and a long dark tunnel. A skeleton girl makes T-Rex dinosaurs destroy Anchorage and a flying snowman fights with William, and Paul and kidnaps Dana. The boys watch the pterodactyl bird and T-Rexes fight and they find portals to other lands. William gets lost in a portal. The boys try to find out why weird and scary things are happening to them and their friends.