M38,221, in industrial world of calumet, When an school was attacked by cult of Red Disciples, chaos followers. The chaos invade the village and rounds up top officials, including planetary governor, imperial bishop, and prominent figures.
So a group of teenagers escape to the wilderness, they are blocked by cultists, are only rescued by Lightning fighter. They form resistance groups, which is called wolverines. With an information from abandoned guardsman, they learn that half of planet is captured, and are behind enemy lines.
When Dar, one of member member is corrupted by chaos, the leader of resistance, robert executes him.
After many battles, they escape the crossfire of battle, but only jed, matt, danny and erica survive.
At the end, they all the survivor has been rescued by an space marine chapter. Male members are recruited into that chapter and erica has been enrolled in scholar progenium, and later inducted into inquisition. However, the planet has been subjected to exterminatus.