after the first halo is destroyed the covenant leadership discovers an odd glowing light that destroys anything near it so they establish a secret fleet to study it but the light attacks and they recieve a mayday and they go to the humans for help

Set at the end of Mechwarrior-4-mercs and Halo 3, Specter and his team are in-transit when their jumpship experiences a malfunction bringing them into another universe. In this universe they find Humanity in a war for survival and have to fight to survive

A mercenary unit, fresh from a stunning victory, jumps to their next home...only to find that Fate wants them elsewhere, on a mission to save humanity. Are they up to the challenge?

So just why did Clan Wolverine rebel in the early days of the Clans? What really pushed them to nuke an entire genetic repository, and why have they not been heard from since? How would a SPARTAN like John-117 integrate into the Clan Warrior Caste?