Long ago, the worlds of the humans and the Fae were one; however, some members wanted to strike out on their own. To live outside of the comforting embrace — and controlling nature — of the Fae Court of Elfame. The Fae agreed, but on one condition: these people, the humans, could never perform magic or return to Elfame. This is the Covenant.

After thousands of years, the humans survived and prospered, using only their ingenuity and tenacity. The memories of the Fae became tales they told to their children at bedtime, and they gradually learned about the forces governing their world and how to subvert them for their benefit. The Fae elders used this to convince the queen that the humans had broken the Covenant. Taking their advice, she ordered her armies to put an end to their abominations and return the humans to the embrace of the Wellspring of Life.

Kataru, a Fae princess, initially travels to the human world to aid in the Nemesis; the process the Fae will use to return humans to the Wellspring. Katelyn, a human drug dealer, is struggling to make ends meet after going into debt because of her mother's medical bills when she is caught in the Fae's opening salvo. When the two meet, Kataru learns that human magic may not be as it seems. The pair join forces to put a stop to the Nemesis and save the human world from annihilation, while learning about the Fae elders' true intentions.