Mitch and Jamie hatch a daring plan to undermine the Noah Objective once and for all, and the team reunites on the Island of Pangaea where the final pieces of the cure are put in place.
Ten years after the animals were cured but at the cost of sterilizing the human population, a new threat rises in the form of "the hybrids," an army of unstoppable lab-made creatures focused on destroying mankind.
Jackson and Logan discover a link between the hybrid attacks that occur in Portland and New York; Mitch is interrogated by a woman claiming to be his daughter, Clementine; and a new development in Abraham's research into the sterility crisis endangers his family.
Abraham and Dariela consider making a deal with Reiden Global for personal reasons, and Jamie and Clementine perform a risky surgery on Mitch.
While Jamie's under arrest, she manages to manipulate Mitch and Logan into helping her hunt shepherds, members of a secretive group responsible for sterilizing humans.