Farewell to the hustle and bustle of the past, the increasingly desolate mining town of Coldstone has ushered in the most sad and terrifying moment. For a long period of time, children in the town disappeared one after another, and people believed that a tall man like a devil took the children away. The missing children case shocked the whole country and made the residents of Coldstone nervous and anxious all day long. Julia Denning (Jessica Biel), a small town nurse who lost her husband early in her life, did not seem to believe in the legend of the tall man. For her, getting along with her son David (Jakob Davies) was all happiness. On a night that had just been baptized by heavy rain, Julia, who was slightly drunk, suddenly found that someone had invaded her home, and her son David was nowhere to be found. She chased out in panic and saw a car about to escape. Julia ran forward desperately. Does the legendary tall man really exist? And what is his purpose in robbing children? Mother's love makes people become angels, and mother's love makes people become demons...