Far Cry Primal is set in 10,000 years BC in the land of Oros, after the end of the last Ice Age. It follows the character of Takkar, a hunter of the Wenja tribe.
The story begins in a cave, where Tensay tells the player of the Wenja and how they found Oros. He then stated that rival tribes arrived as well and brought darkness to the Wenja; the Udam, eaters of flesh, and the Izila, masters of fire. He then continued by saying that light comes in the form of the lost Wenja brothers.
Takkar is first seen with his group hunting Woolly Mammoths, for they have gone several days without food on their journey to Oros. After successfully separating a young Woolly Mammoth from its herd and killing it, the hunting party gets ambushed by a Sabretooth Tiger. After everyone but Dalso and Takkar has been slaughtered, they are cornered to an edge of a cliff and Dalso saves Takkar by grabbing him and causing both of them to plummet down the cliff-face. Takkar survives, but Dalso is left with only a few seconds to live. After Dalso gives his last breath urging Takkar to find Oros and the rest of their tribe, Takkar pays respect to him by giving him a proper burial.
After crafting a bow, gathering goat meat and finding shelter, Takkar notices an arrow crafted by Wenja. He then crafts a club, sets it on fire and follows a trail using his hunter vision. He encounters Dire Wolves, which he scares off with his torch. He then enters a cave and finds Sayla amputating ears off corpses. Sayla mistakes Takkar for an enemy and fails to notice a Sabretooth Tiger, even after Takkar warns her. The Sabretooth Tiger pounces on Sayla but Takkar holds it off with his torch, giving them both a chance to escape and finally enter Oros.
Sayla then notices that Takkar is a Wenja and they both introduce themselves. Takkar questions why Sayla was in the tiger's cave, with her response being that she needs ears. Sayla then takes Takkar to her home and gives him berries to eat. She informs Takkar of Ull, the leader of the Udam tribe, and how they destroyed the Wenja village, leaving all Wenja in Oros scattered and homeless. They then discover that their encounter with the Sabretooth Tiger left Sayla with a lethal wound in her back. Takkar is told to find green leaves to heal the wound. During his search, he spots the Udam for the first time. After saving Sayla, Takkar goes to explore Oros. Before doing so, Sayla informs Takkar to tell any Wenja he find of their location due to it being safe.