In response, the UNSC sends the Phoenix-class former colony ship Spirit of Fire (now re-outfitted as a heavily-armed warship) to investigate.
The Covenant have their beady little eyes on an ancient structure housing a mysterious relic, and they're determined to remove and study it.
It's twenty years before the events of Halo: Combat Evolved, and human forces have just won a fierce battle with the Covenant on the surface of the planet Harvest, an out-of-the-way world in the Epsilon Indi system.
