Ensign travis Mayweather takes leave when Enterprise rendez-vous with the cargo ship Horizon, his childhood home. The family reunion is bittersweet when Mayweather learns of his father's death and he butts heads with his brother/Acting Captain, Paul, who resents Travis' leaving the Horizon and finding a successful career with Starfleet. Meanwhile, Enterprise backtracks to visit a planet undergoing drastic geographical changes. T'Pol looks to avoid attending movie night.