A lowly utility worker is called to the future by a mysterious radio signal, he must leave his dying wife to embark on a journey that will force him to face his deepest fears in an attempt to change the fabric of reality and save humankind from its greatest environmental crisis yet.

During the Vietnam War, a recon unit ventures to an isolated jungle valley to uncover the fate of a missing platoon. They soon find themselves in a fight for their lives against an unexpected enemy — prehistoric dinosaurs.