The final battle against the Witness begins as the fate of time and mankind hangs in the balance; all the pieces finally come together to mark the end of the beginning.
Cassandra Railey goes back to 2020 on a mission to kill Dr. Katarina Jones. Followed by James Cole to stop her from this mission, they find themselves stuck in a time loop.
Cole and Cassandra search for the primary in 1957 to prevent the paradox , while in 2044, Ramsey, Deacon and the daughters try to find titan to kill the witness.
As the temporal facility gets closer to destruction, Cole goes to 1957 to save humanity while everyone else looks for Titan, the stronghold of the Witness.