In a world where dragons are the life source, their sudden mysterious deaths slowly push Zeala into peril. When nineteen-year-old Alice Reid investigates the cause, she runs into members of a rival paramilitary organization for the first time. The encounter takes a violent turn, igniting Commander Rio Shackler's curiosity for two reasons: Alice can summon a mythical being, and clues about the deaths conveniently point to her. With Rio's mission to enforce dragon safety, he pursues Alice to eliminate a potential threat. The two clash, unaware of the other's agenda, and unknowingly fueling their divided organizations.

As more dragons perish, the world withers from the depletion of its life force. Trees die, fires lose oxygen, grass dries out, plants wilt into black rot, and the water supply dwindles. Alice and Rio find themselves on opposite sides of the truth but with a common enemy that binds them. In order to work together, they must set aside their bickering, scheming, and contrasting personalities, but mutual loathing won't be their only obstacle. Questionable deities, a nefarious cult, and corruption brewing in the heart of the monarchy threaten each step they take toward saving their world. If Alice and Rio can't unravel the mystery in time, the feud between their organizations will be the least of their worries.