Girl is Trapped in a Room of Phones; Picking Up a Receiver Triggers a Terrifying Event

Reese finds herself locked in a small room filled with phones. She notices a black phone with a mysterious number and dials it. After an automated message declares she’s won a 'Royal Flush,' water starts pouring from the phones, flooding the room. Reese realizes 'Royal Flush' is a clue and sees a toilet on the ceiling. She climbs the phones to reach the toilet but finds it lacks a handle. After dialing the correct number on the phone, it reveals the handle, allowing Reese to flush the water out. She succeeds in the challenge, which turns out to be a virtual reality game. Reese removes her VR headset at a specialized gaming center and heads home to join her father, Chris, for dinner.

While Reese is chatting online with friends about her game, a sudden short circuit causes power and communication outages across the city. Her computer catches fire, but she quickly extinguishes it. Chris, her father, sees the outage as a chance for a break from technology, though Reese is worried about the city's situation. She remembers her eccentric grandfather Frank, who has a book about power outages and survival techniques. Despite Chris’s skepticism, they end up reminiscing about family, eventually falling asleep in the living room. That night, Reese notices a strange flash outside and heads to her grandfather's workshop to investigate.

Reese finds a book titled 'Radio Flash' in her grandfather's workshop, which discusses electromagnetic pulses (EMPs) and their impact on power grids. She repairs her grandfather's old radio and reaches out to him for information. Frank confirms that an EMP has caused the power outage and warns that things will soon get worse. He insists that Reese and Chris leave their home and come to his mountain cabin, where he has prepared for such a disaster. He directs Reese to a map and a radio to guide them, explaining they need to act fast. Meanwhile, Frank stocks up on supplies at an abandoned store.

Reese wakes Chris the next morning, explaining the situation and urging him to leave. Despite his initial reluctance, Chris eventually agrees after speaking with Frank. They prepare for the journey, encountering a chaotic scene at a store where people fight over supplies. As they continue, they reach a traffic jam caused by an accident. When tempers flare among drivers, Reese and Chris rush to escape the scene. Later that night, Chris, distracted while driving, misses a turn and crashes their car. The next morning, they decide to walk the remaining 20 miles to Frank’s cabin, but Chris's condition worsens due to his injuries.

While walking, Chris's injuries become severe, and he collapses from exhaustion. Reese seeks help at a nearby farm, where a man named Glenn provides first aid. However, Chris passes away unexpectedly. Grieving, Reese buries her father with Glenn’s help. Glenn offers to drive Reese to her grandfather’s place, but along the way, they encounter a dangerous man who shoots Glenn and steals the van. Reese hides inside and later escapes, but she is captured by a hunter who takes her to a mysterious family. This begins Reese’s harrowing encounter with Ma, Bill, and Quinn, who live in isolation in the forest.

Reese is held captive by Ma and her family, who try to convince her to stay with them. Ma offers disturbing choices, like staying permanently or choosing one of her sons as a partner. At night, Reese attempts to escape, only to be recaptured. Quinn, Ma’s grandson, eventually helps her escape by sneaking food and tools to her. Reese persuades Quinn to leave with her, and they break out of the barn. As they flee, they are pursued by Bill, who tracks them through the forest. Reese and Quinn face several life-threatening encounters as they try to outrun Bill.

During their escape, Reese and Quinn nearly fall off a cliff, but manage to cross a fallen tree acting as a bridge. Bill continues to chase them, opening fire. The two hide in a pond but are eventually discovered. Quinn fights his father, and just as Reese is about to shoot Bill, her grandfather, Frank, arrives and shoots him instead. Reese, Quinn, and Frank reunite, and they continue their journey to the cabin. Once settled, they adjust to a new way of life without electricity, focusing on daily survival. Quinn begins to explore the digital world via Reese's repaired iPad, signaling that life is starting to return to normal.