Prior to his defection, ‘Refumee was a loyal member of the Covenant. During the Battle of Installation 04 in September 2552, ‘Refumee’s expiditionary group was sent to the nearby Forerunner gas mine above the gas giant Threshold for study. While there, the battle on Alpha Halo concluded with the detonation of the Pillar of Autumn’s reactor and destruction of the halo, leaving ‘Refumee and his group stranded. Soon after, 343 Guilty Spark, now without his assigned halo, traveled to the mining facility and came into contact with the Covenant forces there. During this time, Guilty Spark spoke with ‘Refumee, explaining the true purpose of the Halo Array and the fate of the Forerunners. Realizing the Covenant faith and the Great Journey was all lies, ‘Refumee and his group revolted against the Prophets, causing them all to be labelled heretics by the Prophet of Truth.
On October 20th, 2552, Thel ‘Vadamee, now appointed as Arbiter, led a group of Covenant forces to the gas mine in order to put down the rebellion and execute ‘Refumee. The heretic forces put up a fierce defense including releasing the Flood against the Covenant forces, but ‘Refumee was ultimately killed and the rebellion quelled.