Three years after the death of her father, eighteen-year-old Elle finds herself moving across the country to New York City to live with her mom's new fiancé, away from all the memories of her dad. One night when she goes out to meet a friend (if you can even call him that), disaster strikes, and she wakes up in a completely foreign place with the constant threat of the dangerous man that oversees it all.

She quickly discovers she isn't alone. She befriends her fellow captees, Bonnie, Lewis, and Jaden, who have all gone through something akin to what she has.

But after a devastating loss and their plan to escape going awry, Elle, with the help of her new friend Jaden, must decide how she's going to get themselves home in one piece, but with the dangerous man wreaking havoc to anything that crosses his path, Elle quickly learns that promises are much harder to keep than they are to make.