ok so when the pillar of autumn launched into space we were attacked by the covenant but luckily we were saved by some guy whose name is master chief (or John) he's like you but on steroids. And then he saves like a few people and then he gets into an escape pod and then he crashed into a super weapon called a halo ring. It was said to destroy all life in the galaxy or something. Then he realized that there are other survivors on the ring with the help of the package you bring to the P.O.A, Cortana. Then the master chief rescued the survivors and went to find captain keys *continues explaining the events of halo CE, halo 2, halo 3, halo 4, halo 5, and halo infinite.