The twist: Agent K is about to travel back in time to 1969, while Agent J remains in the present (2012) to protect the timestream. As Agent K navigates the cultural and social landscape of the 1960s, he encounters a younger version of himself (Josh Brolin), who is still a rookie agent. Together, they must prevent Boris and her accomplice, a youthful alien named King (Jemaine Clement), from disrupting the timeline.