When a gas explosion vaporizes half a man's torso, Charlie Crews and Danni Reese work to figure out if the explosion was an accident or arson. Their investigation reveals the man with half a torso was an IRS agent living a complex life complete with two careers and two wives. Could this IRS agent's quest to become a hero have gotten him killed? Meanwhile Detective Carl Ames, who oversaw Crews' murder investigation, is found dead in the parking lot of the police station. Once again, Crews finds himself at the center of a murder investigation.