A massive alien spacecraft of enormous power destroys three powerful Klingon cruisers, entering Federation space. Admiral James T. Kirk is ordered to take command of the USS Enterprise for the first time since her historic five-year mission. The Epsilon IX space station alerts the Federation, but they are also destroyed by the alien spacecraft. The only starship in range is the Enterprise, after undergoing a major overhaul at Spacedock on Earth. Kirk rounds up the rest of his crew, and acquires some new members, and sets off to intercept the alien spacecraft. However, it has been three years since Kirk last commanded the Enterprise - is he up to the task of saving Earth?