Dipper and Mabel return to Gravity Falls for their regularly scheduled visit with Grunkle Stan and the Mystery Shack. But on the way to their Summer home, Dipper meets a mysteriously familiar stranger.

Alexander Hamilton has recently been accepted into King's College, and he's scared. He's never had friends growing up, and has too much to say at once. But will his overly energetic room mate change his views of the future ahead of him?