In Star Trek Shattered Universe, you play a fighter pilot aboard the USS Excelsior, under the command of Captain Sulu. During a routine mission, the Excelsior is pulled into the hostile Mirror Universe ("Mirror Mirror" [TOS]). You will help to protect the Excelsior while she makes unlikely allies and discoveries on her quest to return to her own universe. In your travels you will encounter objects familiar to the original Star Trek series, including the Guardian of Forever and the Planet Killer.