After losing her laundry store to a fire, single mother Deok-hee receives a call from a bank offering a substantial upfront loan, which she accepts right away. However, she quickly discovers that she has become a victim of a voice phishing operation. In a moment of desperation, Jae-min, the phisher who duped her, rings her phone once more to warn Deok-hee about the criminal organization that imprisoned him and forced him to make voice phishing calls from China. With that call, Deok-hee decides to investigate the situation herself and fly to China with her pals.
