14 years after the events of Terminator 3 Rise Of The Machines and 4 days before the events of Terminator Salvation, a Resistance lieutenant named Mariko Nakamura, who's unit has been killed by terminators, must find her way back to John Connor's headquarters. While on her way to get back, she would encounter survivors who join her and there, they would come across Terminators that attack them throughout their journey to find their way to John Connor's Resistance Headquarters.