An 18th birthday mushroom trip brings free-spirited Elliott face-to-face with her wisecracking 39-year-old self. But when Elliott’s "old ass" starts handing out warnings about what her younger self should and shouldn't do, Elliott realizes she has to rethink everything about family, love, and what's becoming a transformative summer.

Young cadets train to become Starfleet officers as they deal with friendships, rivalries, and romance, all while facing a mysterious threat to both the Academy and the Federation.