In 2285, the Federal starship USS Enterprise, damaged during a battle with Khan, returned to Earth's spaceport for repairs. Kirk is still saddened by Spock's death. Dr. McCoy showed various abnormal behaviors: breaking into Spock's original cabin in lockdown, babbling, etc., and finally he was taken to the hospital for a mental examination. Scotty was assigned to the USS Advance. The Starfleet Command has issued a ban on entry to the newly formed planet Genesis. Kirk was told that the Enterprise was about to be decommissioned. Spock's father, Sarek, approached Kirk and told him that Spock's body must be returned to Vulcan or his soul would not rest in peace. Sharek demanded that Kirk return to Genesis, retrieve Spock's coffin and bring it back to Vulcan-and Spock had a spiritual fusion with McCoy before his death, so McCoy, with Spock's soul, must also travel to Vulcan. However, Starfleet refused to let the old Enterprise leave the spaceport. McCoy, who heard the news after coming out of the hospital, attempted to recruit a spacecraft to return to Genesis. He was arrested during an argument, but that did not affect the entire plan: the help of Kirk, Scott, Sulu, Uhura and Chekov...