No Charge Airline Ticket [무료항공권]

Donghwan is unemployed. One day, he applies for a quiz for a no charge airline ticket on the Internet. The next day, he receives a phone call asking him to come to an office in Jongno-gu, Seoul because he has won the quiz, where he will receive the free round-trip ticket to Thailand. But for getting free tickets, he has to pay a high price there...