Lights Out

Aly, a trauma ER nurse in an understaffed inner-city hospital, is unraveling under the weight of her job. After talking a new colleague, Brinley, through a breakdown, she returns home to her cat Fred and decompresses by scrolling masked-man thirst traps online. Her favorite is an anonymous creator called the.faceless.man. Tipsy and lonely, she texts her casual hookup Tyler to roleplay one of the videos; he rejects her and reveals he's moved on.

Tyler shows the screenshot to his roommate Josh, unaware Josh is the.faceless.man. Josh—a hacker, son of imprisoned serial killer George Marshall Secliff, and lifelong recluse terrified of inheriting his father's nature—identifies Aly's account and discovers she's left months of comments fantasizing about a masked intruder. Convinced after meeting her cat that he isn't violent, he breaks into Aly's house, films a video in her bedroom, plants a hidden camera, and leaves his mask on her bed.

Aly discovers the mask and realizes the latest video was filmed in her room. Terror tangles with arousal. She DMs the.faceless.man; Josh taunts her without confirming, then sends explicit footage. Their cat-and-mouse game escalates: Aly arms herself, finds and disables the camera, and Josh sends excessive flowers and elite home-security gear. When Aly asks Tyler to connect her to his cybersecurity-expert roommate to help track her stalker, Josh panics and constructs an elaborate deception—gloves, fake hacking software, an auto-replying burner phone—to host her without revealing himself. Aly is intensely attracted to Josh in person and suspects he's the masked man, but his decoys keep her uncertain.

After a mass-shooting shift leaves Aly nearly forty hours awake, she finds Josh waiting in her running car—masked, voice-modulated, with her gun and a knife laid out to give her control. She gets in. On the drive home, sexual tension breaks; Aly initiates oral sex while threatening him with the knife, accidentally stabbing his hand. She stitches him up and secretly saves a blood sample as insurance. Josh begins quietly caring for her—shoveling her drive, charming her neighbors—while Aly plants a tracker on him. He outsmarts her by driving a route that spells "LOL" and preempts her DNA test by swapping in Tyler's sweatshirt.

Their relationship deepens when Aly is triggered at work treating an accident victim resembling her late mother, whom Aly accidentally killed in a car crash at sixteen. Josh comes masked to comfort her, sharing therapeutic insight from his own past. The night turns into an intense scene that releases years of suppressed grief; Aly stops pushing him away, and he stays.

The plot accelerates when Bradley Bluhm—a wealthy serial rapist Aly confronted at the ER—breaks into her home with a kill kit. Josh subdues him, but while transporting Brad to be dumped at a victim's family farm, they discover Brad has accidentally suffocated under duct tape. Aly turns to her estranged mob uncle, Nico, a crime-scene cleaner. Nico's family takes the body for disposal while Josh accompanies Junior's crew to wipe Aly's traces from Brad's computer. Josh asks Aly to officially be his girlfriend; she agrees.

Meanwhile, Aly's lab tech friend Veronica reveals the bloody rags' DNA matches the Ken Doll Killer's son. Aly briefly panics but, after Tyler explains Josh's traumatic history—including a manipulative psychologist who convinced young Josh he was destined for psychopathy—accepts him fully. Josh, finally believing he is not his father, makes love to Aly for the first time.

The break-in at Brad's house goes sideways: the crew discovers decomposing bodies in the basement, revealing Brad was himself a serial killer. The mob aborts, but Josh stays to wipe Aly's data, evades Brad's parents who arrive to destroy evidence, and cleverly triggers the alarm so police will legally enter and find the corpses. He and Aly flee through the woods, narrowly escaping patrols.

Back home, Josh shares a haunting childhood memory of his father likely transporting a victim, and the couple acknowledges their suspicions that Nico's family may have been willing to scapegoat Josh. Josh later follows through on a promised "punishment" scene, and they confess they're falling in love.

Three weeks later, at a tense family dinner, Nico confirms the cover-up has held: Brad is now the lone suspect in his own crimes, with staged sightings sending investigators toward Canada. When Nico tries to intimidate Josh, Josh reveals secret recordings and demonstrates his hacking power, forcing a wary truce. Driving home, Josh and Aly exchange their first waking "I love you"s.

Six months later, Aly and Josh play out a consensual hunter-prey roleplay in the woods. Josh catches her with seconds to spare, and after rough, joyful sex, Aly impulsively proposes—only for Josh to reveal a ruby ring and propose first. The Bluhms have become public pariahs, Brad's trail ends abroad, and Aly is free of fear. They return to their cabin to find their kittens, Fred and Maud, have destroyed it, and Josh teases about wanting many children. Two outsiders bound by obsession have chosen each other, and the darkness, together.