UNSC Cadet Thomas Lasky must conquer his inner fears and join forces with super-soldier John-117 to take down a massive faction of the Covenant.

In 2525, as mankind has begun to colonise space, a group of cadets are training to fight against human insurrectionists. One of these cadets, Thomas Lasky, has doubts about his abilities as a soldier and his convictions for this war. Whilst he struggles with himself, the planet is invaded by an unknown alien race. Reeling under the assault, Lasky and his squad mates are rescued by John-117, one of the UNSC's legendary SPARTAN-II super-soldiers. John must inspire Lasky to fulfill his potential as a soldier and a leader to fight against an enemy deadlier than any that humanity has faced before.—Marty Goodman

In the future, a group of teenagers from prominent families are trained at the Corbulo Academy of Military Science forming the Hastati Squad to fight against the insurrectionists. Out of the blue, the planet is invaded by powerful aliens and only four cadets survive. When there is no hope for them, they are rescued by the strong Master Chief.—Claudio Carvalho, Rio de Janeiro, Brazil

At a UNSC military training camp on Cirnicus-IV, Tom Laskey trains to fight Insurrectionist (terrorist rebels). But while training mankind is encountered by a religious alien military known as the Covenant, bent on fulfilling the ultimate destiny of the forerunners. It is up to Tom and his squad to escape the planet and live to fight another day.