Fasten Your Seatbelt is a humorous story about Ma Joon-Gyu - a pop star is on a flight from Tokyo to Seoul. The journey would have ended well if the aircraft had not caught up in a big storm. With an inexperiened caption and bad weather, the lives of the passengers on this trip is like a thousand pounds hanging hair. Too alarmed by this situation, pop star Joon-Gyu Lama accidentally exposes the dark side which he concealed.