Mark Kaminsky, an ex-FBI agent turned small-town sheriff, is contacted by his former colleague, Harry Shannon, who wants him to go undercover. Kaminsky's life took a downturn after he was forced to resign from the FBI for excessive use of violence. Shannon offers him an opportunity for redemption and a chance to get his old job back by going on a covert mission to infiltrate and dismantle the ruthless Chicago mob. Kaminsky, under a new identity, finds himself navigating the dangerous underbelly of organized crime, where loyalty is scarce and the price of betrayal is death.

As Kaminsky delves deeper into the mob's operations, he discovers a multi-million dollar illegal drug trade. His quest to gather evidence against the mobsters puts him at great personal risk and strains his relationship with his wife, Amy. Kaminsky's relentless pursuit of justice and his methodical demolition of the crime syndicate's ranks showcases his skills and determination. However, the deeper Kaminsky gets, the more blurred the lines become between his assumed identity and his true self, leading him into a deadly showdown that tests his limits and his willingness to sacrifice everything for the cause of justice.