Neil and Abby Warner are a happy couple living a seemingly perfect life with their young daughter, Sophie. Their idyllic existence is shattered when a stranger, Ryan, kidnaps Sophie and forces the Warners into a series of tasks over 24 hours. Promising not to harm Sophie if they comply, Ryan uses psychological tactics to manipulate Neil and Abby, putting their love and commitment to each other to the ultimate test. As the day progresses, the tasks grow increasingly morally compromising and dangerous, revealing that Ryan's motivations aren't purely sadistic; there's a deeper reason for his actions tied to a painful past shared with the couple.

Under immense stress and desperate to save their daughter, Neil and Abby are pushed to their limits. They must navigate this harrowing ordeal, making unthinkable choices while uncovering unsettling truths about their marriage. With time running out, the couple realizes that the key to their daughter's safety and their own survival lies in understanding Ryan's connection to them. In a race against time, Neil and Abby confront the fragility of their seemingly perfect life, learning that the foundation of love and trust they thought was unbreakable can be easily shattered by secrets and lies.