of dogs, with Stacy telling a story of how he became a dog person after he purchased a poodle to sniff out truffles for a burglary. He'd been caught by a security guard, but the guard was afraid of dogs and ran away. Gage sneaks back into the locker room where he injects heroin. After he is calmed, Gage bangs on the barricaded door for the other two to let him through. The dog sneak attacks Gage and is released from the locker room. Gage's hand is torn up and Walker is injured falling through some scaffolding. After a brief chase the men barricade themselves in the locker room, but the dog gets in through a hole in the wall. The men make it to the back offices and lock the dog out. While discussing whether or not they are dog-people, Gage tells the story of a dog he rescued as a child. Gage's father couldn't feed the dog, and because Gage stole food for the dog, his father killed it in front of him. While searching the office, Stacy and Walker find a back room full of dog-fighting winnings, at least double what they estimate is in their safe. They bag the cash and return to Gage, but Gage has shot up again and died of an overdose. Although severely injured, Walker stops Stacy from calling an ambulance, and urges him to leave him behind. Stacy insists on getting him out using the truck Gage had spotted. Stacy returns to the dead dog handler to obtain his car keys, but the handler's body has been dragged away. Following the traces, Stacy also finds a pile of dead dogs. He is repulsed, but quickly is confronted by the mastiff. The mastiff chases Stacy through several rooms before Stacy ends up hiding inside a grand piano from the dog. The mastiff eventually figures out his hiding spot, and furiously attacks the piano until it collapses. Stacy is knocked out, but as he wakes finds the mastiff is stuck under the debris of the piano. Stacy debates leaving, but instead lifts the piano off the dog, who then leaves Stacy unharmed. Stacy fetches Walker and takes him to the handler's van. As they are about to leave, Blue, the mastiff's owner, pulls up in his car. Seeing them with a bag of his cash, he draws his gun on them and kills