Angels and demons have been in a war for thousands of years, waged in the skies above a neutral human kingdom. Few remember what started the war, but it continues through racial hatred and continued wartime atrocities committed by both parties. Demons and angels both seek the favour of the lesser human beings in order to gain a small strategic edge, but time and time again wise kings, or wise advisors have turned them down, maintaining an uneasy equality in their kingdoms.
Yethzer is a member of the Demonguard, an order of demons equal to great generals when not protecting their king in battle. One day, on a routine training reconnaissance mission he and his young flock are attacked by a group vastly different from any they have encountered before. They are attacked by a flock of demons supported by an angel choir, an impossibility due to the strong inherited hatred in every single member of both races. Yethzer alone escapes and takes his story to the humans, sure that mind control magic is a good reason for the humans to finally side with demonkind. He is thwarted however and the human king is forced to send him on a mission to uncover the truth.
Yethzer must travel with a young human spellcaster and an angel swordsman in order to prove his case. Along the way they must fight mutual enmity as well as the forces which attempt to stop their quest for the truth and for a way to fight a greater enemy then has been seen in 3000 years.