Matthieu de Laval, a Capitaine in the Holy European Legions lies in hospital. After a heroic last stand at a stronghold along the Ninth Holy Crusade's front line, he escaped, missing his left arm and most of his Company. Despite a short-lived respite in the form of his nurse, Andrea Moretti, he is soon assigned a ceremonial position in rural former France. With a spare set of clothes, a toothbrush and a sidearm, he arrives in the sleepy mountain town of Melone, still skeptical of his new, Vatican subsidized life.

There he meets a young girl, Céline Allard, the baker's daughter and the town's youngest Deathseer. As a shepherd of the dead and traveler of the many worlds along the Great Tower's spiral staircase, Céline Allard knows death intimately and more importantly, the truth behind immortality and salvation. As the war continues, the Great Tower destabilizes and the worlds fall into disarray, in turn only worsening the casualties of the Ninth Holy Crusade. Céline pleads for his help in its repair, and he begrudgingly obliges. Brushing close to death once more, yet in a completely different sense, Matthieu learns the value of such myths as immortality and eternity and distills them into a letter.

On what, exactly? Well, it isn't very creative.