The Enterprise responds to a distress call from the planet Mulour, only to find the entire civilization has been destroyed. Then a small probe with incredible weaponry and defense capabilities attacks the Enterprise. After Kirk identifies himself, it agrees to be beamed aboard to make contact. The probe, Nomad, was sent out to explore the far ends of the galaxy, but it has altered and is now dedicated to seeking out and sterilizing life forms. Only the fact that it believes Kirk is its creator is keeping it from destroying the Enterprise... and it starts to see through the deception.
Star Trek chronicles the 23rd century adventures of the U.S.S. Enterprise, one of twelve state-of-the-art starships representing Starfleet, the exploration branch of the United Federation of Planets, an alliance of alien races including Earth, Vulcan, Tellar, and Andor.
Captain James T. Kirk, the youngest starship captain in the Fleet, commands the Enterprise with a combination of brashness, authority, and imagination. The half-Vulcan/half-human Mr. Spock serves as his extremely logical and efficient First Officer and Science Officer. The ship's chief medical officer is Dr. Leonard McCoy, who has supreme medical authority on the ship and tends to the physical and mental needs of the Enterprise's crew of approximately 430.
Other ranking crew members include: Montgomery Scott, a man dedicated to his ship engines but not adverse to a bit of shore leave; Hikaru Sulu, helmsman and a man of many hobbies ranging from botany to fencing, Nyota Uhura, the extremely competent head of Communications, and Pavel Chekov, brash young navigator with a fierce pride in his native Russia.