London, 1875.
When a dying stranger collapses in her father's home with a mysterious parcel and a warning, they're coming for you, Christabel Tomiska has no idea it will cost her everything. Within hours, her father is dead, her home is a crime scene, and she's fleeing through London's fog with a stolen diary that men far more dangerous than her would kill to possess. Taken in by the brother she barely knows, Christabel is pulled into a world of gang debts, double-crosses, and secrets her family spent years burying. As a self-styled lord and a hired killer close in, she must uncover the truth behind her father's death.