"I’ve really tried everything except for drugs now." Hye-joo, an orthopedic surgeon, is suffering from excessive work and stress, and eventually breaks down after losing a patient. She decides to take a short vacation to visit her aunt in San Francisco. Upon arriving at the airport, Hye-joo plans to stay at a hotel near the airport for the night before heading to her aunt's house the next day, but her entire schedule is thrown off by the sudden arrival of some thugs. Due to a mix-up between her suitcase and one containing a bundle of drugs, she gets entangled with the drug enforcement officer Ha-dam, initially treating him coldly, thinking he is some gang member opposing the thugs. However, as they continue their dangerous and thrilling journey, Hye-joo gradually opens her heart to Ha-dam...