4 years after the incident of Paw Patrol: Blacklight, all the humans have died, and the pups are on their own.

  Chase woke up on the floor at the city, and noticed four gangster pups trying to take his police cruiser. He got up and told them "Hey you pups, you might want to knock it off or I'ma have to-"
One of the gangster pups hit Chase with a pipe, and Chase went down. "Come on, let's take his cruiser!" said one of the pups.

    Chase got back up and said "Trust me pups, you don't want to do this!" The gangster pups stood in front of him and the leader said "Fuck him up!" Chase went and bit the leader and all the other pups dropped him back down, and started kicking him and scratching and biting him. The leader picked up the pipe, and was about to whack Chase with it, but Chase said "Get the fuck off me!" and screamed and scratched up the leader's face, then attacked the other pups, he sliced the head off of one pup, then tackled another one and bit his throat. There were only two more gangster pups left, and they decided to team up on Chase. They ran for Chase but he scratched up one of the pups until he died. Now the leader was all alone, but he fell to the ground because he bled out.

Chase got back in his cruiser and said "You don't fuck with Chase Hunter!" And he drove back to the lookout.