the Spartans on reach are trapped in a slipspace world. john is on his way back to earth. there was a second spartan 2 program and only ten spartans survived. only five remain and they are sent on a mission to save the others on Onyx, but they don't know.

a 16 year old who plays halo2 all to finds him self getting drafted into the army. he finds out that the government has been keeping the existence of the covenant secret. He becomes a spartan and this is his fight to save the Earth.