"Once in the Innate Realm, your fate is mine to decide." Yael, the youngest Innate master, lives in seclusion until he is sent to protect Katherine, a genius scientist behind the Celestial Elixir that slows aging. After an unexpected night in Rivergate, she asks him to pose as her shield to avoid an arranged marriage. As factions hunt the Elixir, danger closes in. While she stands in the spotlight, Yael moves in the shadows, silently eliminating every threat that comes near her.