LAPD cop Scott James is not doing so well. Eight months ago, a shocking late-night assault by unidentified men killed his partner Stephanie, nearly killed him, and left him enraged, ashamed, and ready to explode. He is unfit for duty - until he meets his new partner. Maggie is not doing so well, either. A German shepherd who survived three tours in Iraq and Afghanistan sniffing out explosives before losing her handler to an IED. They are each other's last chance. Shunned and shunted to the side, they set out to investigate the one case that no one wants them to touch: the identity of the men who murdered Stephanie. What they begin to find takes them both on a journey through the darkest moments of their own personal hells. Whether they will make it out again, no one can say.