Captain Kirk and his crew must deal with Mr. Spock's long-lost half-brother who hijacks the Enterprise for an obsessive search for God at the center of the galaxy.
When the newly-christened starship Enterprise's shakedown cruise goes poorly, Captain Kirk and crew put it into Spacedock for repairs. But an urgent mission interrupts their Earth-bound shore leave. A renegade Vulcan named Sybok has taken three consuls hostage on the planet Nimbus III, an event which also attracts the attention of a Klingon captain who wants to make a name for himself. Sybok's ragtag army captures the Enterprise and takes it on a journey to the center of the galaxy in search of the Supreme Being.
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