The USS Enterprise, pride of the Federation fleet has been on a continuous mission to boldly go where no man has gone before. During this mission, the crew has decided to take a chance and make a record-length jump into a new system. Only to arrive to find themselves in the middle of what seems to be a fierce battle around a mysterious Ring-World.

The UNSC Infinity continues its mission to hunt down and destroy the remnants of the Covenant rebels. To secure the galaxy from the growing Forunner threat, spearheaded by the AI Cortana. To discover the secrets of Forunner technology and use it to protect Humanity. Currently engaged in a fierce battle over Installation 09, the Infinity and her fleet are determined to hold the line against the covenant's push. Determined to prevent access to the Halo below.

How will both sides react when suddenly thrust into the same conflict. Will they forge a strong new alliance? Or will they become bitter enemies in the realm of space?