Witness the team as they leave the planet Reach and unintentionally begin a great adventure.

The team now finds themselves split up and scattered across a mysterious halo, and each are presented with unique challenges as tensions rise and war approaches.

The battle has begun, and the Spartans finally reunite. But they are unaware of the plans set by the enemy to set the sun forever.

Before they were Spartans. Before the fall of Reach. Before they found Halo. Before he was squad leader. Witness the training and the beginning of the team as they struggle to succeed as well as survive.

After a crippling defeat by the Covenant, the human forces on Halo must unite and stand together as one. The great battle is about to begin.

The humans are at their last stand as Rahgath and his forces push to activate Halo and finish the Great Journey.

The journey has come to an end upon arrival to Earth. Friends depart their separate ways, but the stories will live on.