"Aspis is the poison in a luxurious glass, the smile with a blade behind its back, and the quiet order that echoes through the city's dank alleyways."

An obsessive detective and a methodical FBI agent are forced into a toxic partnership to take down the shadow king of a corrupt metropolis, uncovering a conspiracy that reaches the highest levels of power and forcing them to question who they can trust in a city where law and crime are two sides of the same coin.