In 2003, Kevin Dooley is the head of the Chicago Police Department’s cold case squad. Tasked with re-investigating a 17-year old cop killing after the man originally convicted is exonerated and released, Dooley needs a good investigator with South Side experience on his team. Detective Linda Washington, who knows the territory, needs a new partner. Together they take on the impossible task, with the coldest of trails to follow. The quest takes them deep into Chicago’s vast South Side to uncover decades-old secrets, and as they stir the ashes a cold case becomes a heater case that will test their professional and personal relationship.