After a high-profile shooting incident, Dell Hinton left the Boston Police Department and moved to a quiet community in rural Maine. Living by the lake for a year, he enjoyed the tranquility and considered his future. His friend, the local minister, convinces him to run for the office of Castaway County Sheriff. Once elected, Dell assumes the new position and finds that being a sheriff is very different from being a police officer. The incumbent sheriff tells him about a cold murder case that the prior sheriff has never been able to solve. Dell decides to investigate the case to get justice for the victim while learning to be a county sheriff.