Irish immigrant brothers Michael and Thomas O'Driscoll have returned from the brutal front lines of the Civil War. Unable to adapt to life as farm labourers, they re-enlist in the army and are thrown into ferocious combat with Red Cloud's coalition of Indian tribes in the heart of Montana's Powder River Valley. Thomas finds love amidst the daily carnage-which leads to a moment of violence that will change the brothers' lives forever. Meanwhile, following a double murder in a brothel, Lieutenant Martin Molloy sets off to track down the killers. As he journeys to a remote outpost, he meets Irish nationalist rebels and anti-immigrant nativists who prove to be opposed to his investigations.

Wolves of Eden blends intimate historical detail and emotional acuity in a haunting narrative that explores themes of morality, the resilience of the human spirit and the injustice implicit in warfare.