Skyler Reynolds wants nothing more than an escape from her mundane life. So when she receives the key to Sanctuary, a city in another world, it feels like the answer to all of her problems. Until, that is, somebody tries to kill her.
Desperate to bring her loved ones to join her, she sets out to investigate the attempt on her life. She can't undertake such a quest alone, and soon finds herself joined by Greta, a hard-boiled detective; Finn, a cheerful warlock; and Magnus; a lab experiment. Their investigation will bring them up against a faction of violent warriors, a powerful witch, and an alien invasion on another world.
Though there is more on the line than finding a murderer. The head of the Sanctuary Guard blames the city's mercenaries - and a clash between the two will rend the city asunder. War is coming to Sanctuary - unless Skye and her allies can stop it.