A Warhammer 40,000 novel. Few Space Wolves are as famous as Ragnar Blackmane - his exploits are legendary and his courage is limitless. When Ragnar and his Wolfblade battle-brothers are sent to investigate reports of Chaos attacks on the planet Hyades, he encounters his Chapter's most bitter rivals - the Dark Angels Space Marines. As old feuds come to the fore, both sides call in reinforcements and the situation quickly escalates out of control.