The year is 2259.  Captain James T. Kirk and Spock are onboard the USS Enterprise when they receive an urgent distress call from a space station near the colony of New Vulcan. In response to the emergency call, Kirk and Spock get on board a space shuttle and head for the space station.

As they arrive, they are surprised to find reptilian creatures known as the Gorn attacking the space station. On further investigation, they find out that the space station crew have accidentally ripped open a fabric of space, allowing the Gorn to travel through the Rip and attack them. Kirk and Spock must now take on a dangerous mission to stop the Gorn before disaster strikes.