Plot : James Kirk who after rescuing Mr. Spock and bringing him to Vulcan where he is fully restored, is now the most hated man in the universe, because he disobeyed his superiors and killed a Klingon crew and took their ship. After three months on Vulcan, Kirk decides to return to Earth to face the consequences of his actions along with his crew who aided him. Also accompanying them is Mr. Spock, who is still trying to understand his human side. What they don't know is that an alien probe approaches Earth and is emitting a signal that nullifies all power systems. And it is now vaporizing the planet's oceans covering the planet in a cloud that covers the earth cutting them off from the sun - the planet's main source of energy. The President of the Federation sends a transmission telling everyone about what is happening and to stay away from earth. Kirk upon hearing it, checks out the probe's transmission and Spock postulates that the alien is not hostile merely unaware that it's ...