In 2157 a Citadel Council exploratory vessel is tasked with opening a dormant Relay into unknown regions of the galaxy. What they find is something they never expected. What happens when two civilizations centered around different technologies clash?

"We fought, we bled, we died for our inheritance. We were Gods, and we were finally ready to pass down our Mantle. Then we were betrayed, vanquished from the stars and blotted from history. We have learned from our mistakes. We understand why the Precursors did what they did. We are the Reclaimers, and we will ensure that you face true retribution for your actions." ABANDONED

The Absolute Record. The archive of all Forerunner knowledge. It will lead the UNSC to heights unimaginable. But it will also reveal the impossible that lies hidden within the galaxy.

An Asari Deep space exploration craft discovers an unknown wreck in space, meanwhile the UNSC Gorgon is sent out on a scouting mission into the lost outer colonies.

Knowing that the flood cannot be contained in the milky way galaxy for long. A lifeworker and her team are sent to a neighbouring galaxy to prepare the local species for war against the parasite. And to index them in case the parasite wins.