A high school biology teacher, Jessica Martin, is kidnapped and locked in an attic by a group of violent men. They smash the phone in the room, but Jessica, using her scientific ingenuity, manages to piece together the damaged phone and randomly dials a number. The call connects to the cell phone of a young man named Ryan, who initially thinks it's a prank but soon realizes the seriousness of the situation. Jessica pleads with Ryan to help her, revealing that her captors are targeting her family next. Desperate and running out of time, Ryan must navigate Los Angeles, facing various challenges, to try and save her and prevent a graver disaster.

Ryan races against the clock, trying to elude both Jessica’s captors and the police, who suspect him of reckless behavior. Meanwhile, Jessica's husband and son remain in imminent danger. With limited resources and no clear direction, Ryan's mission turns into a perilous journey full of unexpected twists and turns that test his resolve. The mounting tension reveals a nightmarish conspiracy, pushing Ryan beyond his limits as he strives to do the right thing and uncover the truth behind Jessica's abduction. The connection between Ryan and Jessica becomes their lifeline as they fight against time and danger to avert the looming threat.