On the grim death-world of Fenris, the sparse population faces a daily battle for survival against the lethal monsters and marauding warriors. Young Ragnar of the Thunderfist tribe finds his destiny changed forever when he is chosen to become a warrior of the gods. After being revived from a savage death on the battlefield, he is recruited into the mighty Space Wolves Chapter of Space Marines and thrown into the galactic war against the forces of Chaos. But the implanting of the sacred Canis Helix unleashes his primal instincts and Ragnar must fight to control the beast within before it consumes him forever!