Rocky, Alex, and Money are three Detroit delinquents who make a living by breaking into houses and stealing valuables. Rocky longs to move to California with her younger sister, Diddy, and escape from their abusive mother and her alcoholic boyfriend. However, much to the trio's frustration, their fence keeps undervaluing the items they bring.

Money receives a tip that a man has $300,000 in cash in his house in an abandoned Detroit neighborhood. The cash was reportedly a settlement after a wealthy young woman, Cindy Roberts, killed his daughter in a car accident. The three spy on the house and learn that the man, Gulf War veteran Norman Nordstrom, is blind.

At night, the three approach the house, drug Nordstrom's rottweiler dog, then find a way in. Money goes upstairs and puts a sleeping gas bottle in Nordstrom's bedroom. The group search the house but cannot find the money. Seeing a locked door, Money assumes the money is hidden down there and shoots the lock. The noise wakes up Nordstrom, who overpowers Money while Rocky and Alex hide. After Money insists he is alone, Nordstrom kills him. Rocky, who hides in the closet, witnesses the man open a hidden safe to check his money. After he leaves, she opens the safe and takes the money. However, Nordstrom finds Rocky's shoes and realizes that Money was not the only intruder.

Rocky and Alex evade Nordstrom and enter the basement. There, they find a restrained and gagged woman in a home-made padded cell. The woman reveals herself to be Cindy Roberts. Rocky and Alex free her and attempt to open the storm cellar door. Nordstrom shoots at them and accidentally kills Cindy. He breaks down and cries in distraught over her dead body. Rocky and Alex rush back into the cellar while Nordstrom shuts off the lights, plunging them into darkness. After a blind struggle, Alex knocks out Nordstrom and they flee upstairs.

After blocking the basement door, they encounter the dog, who has woken. They flee into the bedroom, where they are trapped by the barred windows. Rocky escapes the room through a ventilation duct, while the dog attacks Alex. He falls out of a window onto a skylight and is knocked out. When Alex awakens, Nordstrom shoots out the skylight and corners Alex in the utility room, appearing to kill him with a pair of garden shears. Meanwhile, the dog pursues Rocky through the vents, and she is captured by Nordstrom.

Rocky wakes up restrained in the basement. Nordstrom hides Cindy's corpse under a layer of concrete. He reveals that Cindy was pregnant with his "replacement" child. He then prepares to artificially inseminate Rocky and promises to let her go after she gives him a child. Alex, who survived by fooling Nordstrom to stab Money's corpse, saves Rocky and handcuffs Nordstrom.

Rocky and Alex try to leave through the front door. Nordstrom breaks free and shoots Alex dead. Rocky flees as the dog pursues her. She manages to trap the dog in her car trunk but gets captured again by Nordstrom. Inside his house, Rocky disorientates him by setting off his house's alarm system, then hits him repeatedly in the head with a crowbar and pushes him into the basement. The gun fires into his side as he falls. Believing him dead, Rocky escapes before the police arrive.

Before boarding a train to Los Angeles, Rocky and Diddy see a news report about the incident. Nordstrom, who is recovering in a hospital, is reported to have killed two intruders (Alex and Money) in self-defense. He doesn't mention Rocky or the missing money. Rocky and Diddy board the train and leave.

https://en.wikipedia.org/wiki/Don%27t_Breathe
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