In the middle of the night on the streets of LA, Officer Max Kent and his partner of eight years, Allie Baker, respond to what they think is a ... Show synopsis In the middle of the night on the streets of LA, Officer Max Kent and his partner of eight years, Allie Baker, respond to what they think is a routine collision incident. But when the masked occupants of one car emerge with automatic rifles and gun down the men in the other, Allie is killed in the crossfire and Max is left severely wounded. Eight months later, the case remains unsolved and Homicide chalk it up to a robbery gone wrong. Max is furious, devastated and volatile, determined to avenge the murder of his partner. When he struggles to return to his old position in the LAPD, he retrains as a K9 dog handler and is paired with Maggie, a German shepherd who lost her handler in Afghanistan. With Maggie at his side, and unbeknownst to his employers, it's down to Max to investigate the shooting and find those responsible for Allie's death. But as he begins to dig deeper into the case he unearths a web of lies, corruption and treachery that threatens to leave Max himself as the prime suspect.