After horrific events from her past, Detective Marathon Torres of the 73rd precinct in Brooklyn, stumbles upon a haunting cold case file. When things spiral out of control, Marathon is compelled to confront her demons and expose the circumstances behind the tragic murder of a young girl. As close allies turn on her, she struggles to trust her longest friendships and turns towards an unlikely source for answers. Can the former Marine navigate the lies and deception to face her past in order to expose those responsible and bring them to justice?