One fae assassin. One world divided, and her most dangerous assignment yet.

Centuries ago, Faerie was split into two realms: solar and lunar. The sides warred with each other for years, until someone took it too far.

As the solar realm's top assassin, Rian is tasked with investigating the lunar fae responsible for poisoning their water. But when her mission takes her across the border into the lunar realm, she finds herself tossed into the middle of more than she ever bargained for.

Enemies become allies as Rian’s path becomes entangled with fae she assumed dead. Now she must figure out the truth before it's too late. With each decision she makes, it’s a fine line between her success and her demise.