The Ultimate Vampire Resource and Directory

The starship USS Enterprise is undergoing a major refit and its former commander, James T. Kirk, has been promoted to Admiral and is now Chief of Starfleet Operations on Earth. A powerful alien force, in the shape of a massive energy cloud, is detected in Klingon space and appears to be heading for Earth. The cloud destroys three Klingon starships and Epsilon 9, a Starfleet monitoring station that it encounters en route. As it is the only ship in intercept range, Starfleet decides to dispatch the Enterprise to intercept the cloud, requiring its refit process to be quickly finished and tested while in transit.

*Special Note*

This was the only Star Trek film to get a "G" rating.