What kills you makes you stronger. That's how death Harbingers evolve to serve the Sentient. Grey becomes one of them when he is contracted by the Sentient for a chance to settle a score in the living world. However, his contract can only be undone after he fulfills all the terms, and after leaving one of his targets alive instead of reaping her from existence, Grey is forced into yet another contract which, unlike his first, is almost impossible to complete. Grey returns to the living world, where he must not only hunt down an escaped dark emissary and battle resurracts — beings who can resurrect instantly upon death — but face the possibility of fighting his own mother, the Witch Empress Feonna.

The age of wars is over, heralding the dawn of the assassin age. Political disputes are solved by executing top officials who share different views on the prevailing leadership. An independent unit, the Assassins Guild, exists to offer services to the highest bidder. Dale, a first rank assassin, is the guild's most valuable tool. He possesses the skill of shadow motion, an ability that allows him to complete missions that would seem impossible to anyone of lesser strength. In the season of his transcendence as the new Guild Master, he is given a final mission to eliminate targets whose information is undisclosed. Armed with a location and vague details, Dale sets off to complete his final task. Upon reaching the target's lair, Dale discovers that the final trial is a trap, since the mission he is tasked with is one that even he cannot complete. When he fails to act, the guild sends more assassins to kill him, and he barely escapes at the help of a watcher, who strikes a bargain in exchange for offering her help. Dale runs away, questioning his purpose for living after losing his assassin rank. The guild commissions an assassin reaper to hunt down Dale, and the former assassin must not only evade the threat that draws fast towards him, but battle the primordial effects that come as a cost of tapping into his shadow skills.