Hugh Glass guides a team of 19th-century fur trappers and hunters under the command of Captain Andrew Henry. The men come under attack from Native Americans and Glass is mauled by a grizzly bear, which is protecting its cubs. Captain Henry leaves behind two men, Fitzgerald and Bridger, to tend to Glass and his son, Hawk. Fitzgerald decides to expedite matters by killing Hawk and dragging Glass' near lifeless body into a freshly dug grave. The explorer regains consciousness and vows revenge.