In Florida, as Sam prepares to head into work, she picks up a card and types the number from it into her phone. Meanwhile, in Michigan, a phone rings inside a secluded cabin where Emily is held captive by her ex-boyfriend, Charlie, who threatens to kill her if she doesn’t return to him.
Sam faces unpleasantness at a gas station, dealing with both her abrasive manager and an entitled customer. Meanwhile, Emily manages to escape from the cabin, but in doing so, she breaks her glasses, leaving her vision compromised. While hiding in the woods, she tries to call 911; however, the response team informs her that it might take time to locate her. In a twist of fate, she accidentally calls Sam from her missed call log and desperately asks for assistance.
Through a video call, Sam strives to direct Emily as she navigates the forest. As they communicate, a bond develops, with the two young women sharing their burdensome family histories. Emily dreams of becoming an ER nurse like her mother, longing to contribute to their household, while the demands of her mother’s career leave little room for their relationship. On the other hand, Sam moved from Jacksonville to Tallahassee to care for her sick mother, who has unfortunately passed away.
After Emily falls down a ledge and loses her phone, she manages to retrieve it, intent on stealing Charlie's car for her escape. Following Sam's guidance, she manages to get into the vehicle; however, when Charlie returns, Emily runs him over but crashes into a tree. In a moment of rage, Emily intends to kill Charlie with a shard of a broken mirror, but Sam intervenes just in time.
With Sam’s phone battery beginning to fade, she vows to call back once she finds another phone. The wealthy customer from before returns, and Sam requests to borrow her phone, but the customer predictably refuses. In a moment of defiance, Sam snatches the phone and locks herself behind the counter, only to face the woman, her gun-toting husband, and her overpowering manager, all demanding the return of the phone.
As tension escalates, Emily and Charlie argue, and Emily finds herself swept away by a river. Injured and feeling defeated, she receives a timely call from Sam. In an emotional moment, Emily asks Sam to call her mother on the landline, putting her on speaker so she can communicate one last time. With tears in her eyes, Emily offers a heartfelt apology to her mom, who encourages her to fight to survive. In a shocking revelation, Sam admits that she hadn’t fully shared her own truths; she left her mother alone one night, and when she returned, it was to find that she had tragically passed away.
Sam guides Emily to a barn where she hides from Charlie as he approaches. Back at the gas station, Sam is cornered by the wealthy woman and others, all demanding their phone back. Inside the barn, Emily bravely sprays Charlie with pesticide, yet he retaliates by attempting to choke her. In a moment of instinct, Sam reminds her about the shard of mirror she had pocketed earlier. With renewed courage, Emily uses it to stab Charlie in the neck, ending his threat just as the sirens signal approaching help. Meanwhile, the police arrive to take Sam into custody, but seeing Emily safe prompts Sam to willingly surrender.
In the aftermath, Emily video calls Sam, revealing that they have built a close friendship. She excitedly shares that she plans to travel to Japan with her mother, while Sam hints at returning to school. Curiously, Emily asks about the call Sam made that day when she dialed the wrong number. To this, Sam lightheartedly replies that she was merely trying to order a pizza.
As they end their call, Sam drives away, tossing the card indicating the "Tallahassee Suicide Prevention Center" out of her window, a poignant symbol of their journey towards recovery and friendship.
