《野蛮纪源》呈现了进化初期的一个穴居人与濒临灭绝的恐龙，在悲剧的捆绑下，这段不可能的友谊成了在暴力的原始世界中生存的唯一希望。

　　Colonel Branson (Thomas Gibson), head of a secret and covert division of the NSA, keeps the Shadow Wolves operating albeit now independent and rogue. His anger after his daughter was killed in Afghanistan training civilians drives him to defend "his" America and her borders by all means legal or otherwise. When ISIS terrorists begin to sneak across the US Border into Arizona, Branson alerts the Shadow Wolves to track and stop them. Branson sends Eric Shaw (Cody Walker), his most deadly and effective agent, to join up with the Shadow Wolves. The Wolves are led by Nabahe (Graham Greene), a Navajo honored military veteran, and an old colleague of Branson's. At the same time in London Lady Milton-Simon (Louise Lombard), head of an MI6 anti-terrorist division, sends out her elite agent, Major McLaren (Tom Hutch), to track a terrorist named Khan (Solomon Shiv) who has a personal vendetta against the US and the Shadow Wolves. Lady Milton and McLaren learn Khan is heading to Mexico to be ...