Ten years after graduation, a mini-reunion is organized by Tom and Jill Miller at their home, inviting only the special friends that were in their clique and one fringe member, Bobby Zwick, whom they had done a terrible wrong. Bobby said all was forgiven, but he was not telling the truth.

Using breakthrough flesh-regeneration technology, a biotech firm creates a set of living dinosaurs. But when the creatures escape their museum exhibit and terrorize Los Angeles, a former firefighter must rescue his teenage daughter from the chaos brought on by the Age of Dinosaurs