Five years following the events of Code 8, the LCPD has reformed their militarized tech program, replacing the armed humanoid robots (Guardians) with non-lethal companion K9 robots, similar to dogs. Under the leadership of Sergeant Kingston, the project has been a success and the streets have never been safer. Having just got out of prison, Connor works as a janitor at a youth community centre, run by Mina. There, Connor keeps his head down and tries to stay out of trouble, leaving his past behind.
Garrett has taken control of an apartment complex where runs his “ethical” drug empire, paying powered people for their spinal fluid to make the drug psyke. Pavani and her older brother Tarak live in poverty within this community. When Tarak’s desperation leads him to steal a bag of cash from Garrett’s gang, he gets caught by Sgt. King and his unit of corrupt cops, who are being paid off. To cover it up, King orders a K9 unit to hunt Tarak down, injecting him with psyke to make it look like an overdose. Pav witnesses the murder, and using her rare ability, she causes the robotic K9 to malfunction and escapes.
Pav finds refuge at the community centre, where Connor and Mina help her stay hidden from the LCPD. Connor seeks out Garrett’s help to broker a peace deal, which includes wiping Pav’s memory of the murder. But when Connor realizes the mind wiper is erasing every single memory she has of her brother, he fights to break her free. Turning to Mina, they attempt to flee the city together but get ambushed by Garrett and his crew. During a tense standoff between Connor and Garrett, Sgt. King deploys robotic Guardians and orders them to kill everyone on site. Mina sacrifices herself and Connor, Pav, and Garrett manage to escape.
Detective Davis tracks them down and they learn that the only way to expose King for his crime is by breaking into his home and steal his K9 unit, which holds evidence of Tarak’s murder in its memory. After stealing the K9, Connor, Garrett and Pav escape to the Towers. Here, Garrett turns the tables on them, wanting to use the K9 as leverage to hold King and his officers at bay.
King and the officers surround the Towers and ambush the group after Garrett failed to broker a new deal. Garrett’s co-workers lets Connor and Pav escape while they stall the cops. A lone K9 goes after them and after a failed electric attack from Connor, Pav unlocks her full power and manages to turn the K9 against the cops. Once outside, they are in a final standoff. Garrett holds off a K9 and King himself until Pav finally manages to broadcast the recordings from King’s personal K9, bringing justice for her brother’s death.
Three months later, King is arrested and the K9 program is shelved for further inspection. Garrett is in prison and Connor has managed to start up the youth community centre with Pav in Mina’s honour.