Master Chief is seen flying through an Energy Tube leading to the Forerunner Ship, he soon reaches it and lands on his back as the huge door closes. Lucky he was just in time to escape High Charity, or he'd be plunged down to the abyss. "Chief, when you get to Earth, good luck." Cortana said, "After I'm through with Truth." John worried.
"Dont make a girl in promise, if you know you can't keep it." Cortana said Sadly, as she believed she wont be seeing him for a long time. The Ship begin to take off, passing through the Brute and Elite ships engaging eachother, and going through Slipspace. The Ship enters the Milky Way, and heads to Earth, Master Chief's destination. He entered Earth's Atomosphere, the Dreadnought's heat signature turned it into a Fireball. The Master Chief holds onto a door, as it breaks off, and flies towards the surface at a fast speed, turning that into a fireball aswell. He plunges into the ground knocking him out, the Door lands at a fast speed, causing a high impact crater, creating a puddel which caused a huge splash, rocking the tree leaves and branches.
Here it is, the Halo 3-era of the story. This is just the intro to it, so get ready for the next chapters.