Initially training to fight human insurrectionists, the academy is suddenly invaded by a mysterious and overwhelming alien force—the Covenant . The cadets, led by Lasky and eventually rescued by Master Chief (John-117) , must fight for survival. Halo 4: Forward Unto Dawn [Blu-ray] - Amazon.com

Commander Thomas Lasky, aboard the UNSC Infinity, receives a distress signal from the wreckage of the Forward Unto Dawn (where Master Chief is adrift).

Set 31 years before the game, the story follows Lasky as a young, skeptical cadet at the Corbulo Academy of Military Science on the planet Circinius IV.