Scarlett Grey, disgraced assassin, is determined to get revenge. Quinn Adams, medic turned-poisoner for hire, is her deadliest rival. For years, they've stolen each other's clients, sabotaged each other's business, and occasionally… slept together. When the Magician Queen offers an irresistible deal, Scarlett and Quinn are forced to work together. But this is not a simple job. With an impossible heist ahead, they're going to have to trust each other… And that's not easy when they both have secrets to hide. Harder still when those secrets will betray the ones they love.

Boston Homicide Detective Caitlin Reagan walks a razor's edge, propping up her life on emotional constructs designed to help her manage grueling PTSD. She keeps her mother, boyfriend, and work separated and controlled, all in service to one horrible, tragic act she committed amid the Iraq war.

Sergeant Nix Marr is a damn good soldier, but she's desperate to leave her haunted past in the bioluminescent ocean, buried alongside old friends...and old flames. Unfortunately, even the icy ocean can't extinguish some fires. When Kessandra, everyone's favorite princess—and Nix's loathed ex—requests Nix's help investigating a massacre in the abyssal city of Fall, Nix refuses. Vehemently. But Kessandra always gets what she wants.

With her betrothal imminent, the beautiful Princess Ava has gone missing. Where has she fled to? Why has she gone? And why is the dragon stirring? Enter our hero. Gwen has been hunting wanted criminals for years, collecting bounties to provide for her mother and brother since the death of their father. The promise of an armful of gold for bringing the princess home is too good to ignore. But bringing her home doesn't solve anyone's problems. Gwen still has family to support, and Ava still has a miserable marriage to look forward to. 

Aboard the pirate ship Dove, Flora the girl takes on the identity of Florian the man to earn the respect and protection of the crew. For Flora, former starving urchin, the brutal life of a pirate is about survival: don't trust, don't stick out, and don't feel. But on this voyage, Flora is drawn to the Lady Evelyn Hasegawa, who is headed to an arranged marriage she dreads. Flora doesn't expect to be taken under Evelyn's wing, and Evelyn doesn't expect to find such a deep bond with the pirate Florian. Neither expects to fall in love.