The Spirit of Fire reaches Arcadia to find the planet under attack by Covenant forces. Professor Anders and Sergeant Forge head groundside to investigate the Covenant's presence.
As the newly activated Forerunner fleet threatens to give the Covenant unassailable power, the crew of the UNSC Spirit of Fire risks everything to stop them.
After the Covenant Arbiter abducts Professor Anders, the UNSC Spirit of Fire goes after the Covenant ship on a desperate rescue mission.
The Arbiter prepares to use Anders to activate the Shield World - unlocking a mystery that could mean the end of humanity.
The UNSC Spirit of Fire engages with the Covenant on the colony of Harvest. Sergeant Forge and the ground crew discover a Forerunner relic, but they also are introduced to Covenant Arbiter Ripa Moramee.
