Masterchief, Cortana, etc... are heading back to Earth. They're overjoyed as they've just won the war. Suddenly, without any warning a Covenant mothership appears from a huge crack in space. They begin to fight to try to suppress the shooting. UNSC begins to lose and they retreat but the ship comes for them. Success is looking bleak. A Covenant Laser is fired directly at Masterchief's head and he collapses. He is dead. The fight continues but the camera pans into Masterchief's helmet and zooms in. A flash of white appears and there is silence. Masterchief is alone in a white room with him in full kit and helmet as usual. Only one thing is in the room. A round door with a digital note on it saying ‘Come, John. We've been waiting.' He enters the door. It closes behind him. It turns out to be a time portal. It opens again. He steps out and sees himself in kit and helmet and a human Cortana. ‘We've been waiting for you. The war is long but worth it. We knew it was to happen. We knew what was to happen.' Cortana mysteriously says. The other Masterchief says, ‘We timeported here just like you did just before the war turned for the worst. We're far from home. This is Earth and it is the dawn of time. We left the war because we had a plan.' Behind Cortana and Masterchief, a massive workforce is building a section of the Delta Halo. ‘So far, we've discovered ways to invent timeporting technology. The Halos? We built them. We created them. We knew we'd need them. They're there for a bigger reason. We are the Forerunners. Cortana says, ‘John. I know you. Your past. Your future. You're destined to save the universe. I believe in you. If you believe in me, we will Finish This Fight once and for all. Believe. Believe. Believe.' As Cortana repeats the word, Masterchief is being pulled away from them by some gravity like force. He falls sleepy. He wakes up. A Covenant Laser is fired directly at Masterchief's head. He rolls out of the way just in time knowing what's happening. The mothership is invading them along with Earth. Covenant soldiers are accross the horizon in their trillions. Masterchief is shot in the arm causing him to drop his weapon. His companion, The Arbiter is shot dead on the spot. They retreat again. Suddenly, without warning, a second, slightly smaller ship appears. At this point, all the nearby Halos start spinning and accelerate their spinning at huge speeds. Huge Forerunner adapted UNSC ships fly out and begin ‘eliminating' the enemy forces. Forerunner Masterchief gives the UNSC Masterchief a ‘thumbs-up' through the window. Both ships are gone, all enemies are gone and the Forerunners depart as quickly as they arrived. Camera cuts back to Earth with a subtitle. ‘10 Years Later'. We see Masterchief's helmet. Camera zooms out and the helmet turns out to be held by John-117. We see his face for the first time. Someone shouts for John. It's his young son. John goes outside with his son and stargazes with him. Several Halos are seen in the sky. ‘The Halo Project. Defending the Earth' John says. Shooting stars past at high speed. Camera zooms into space, then fading to black. ‘The End'. Credits roll with Halo theme playing.