With life as a pawn in a prestigious Boston law firm behind him, Scott Finn has set course through the more colourful back alleys and bedrooms of the legal world as a solo practitioner who dabbles in civil litigation, divorce law, and criminal defence. A policewoman is left for dead in an alley, but survives and points the finger at an El Salvadoran immigrant with ties to one of South America's most dangerous and notorious gangs. There's just one problem: the evidence suggests the wrong man's been fingered. Finn, along with the maverick detective Tom Kozlowski, must now navigate through this explosive case to save an innocent man's life. But with time running out, it is Finn and Kozlowski whose lives hang in the balance as they search for the thin line between guilt and innocence.