Jack, an 18-year-old substitute taekwondo athlete decides to leave this career. With the responsibility of being the breadwinner of his family, he applies for a loan to open a youth development center and also takes on the role of a debt collector. Jack meets Joker, a master of disguise and a skilled con artist who masquerades as a successful bank employee to deceive his wealthy family. However, their lives unexpectedly turn when they are entangled in a complicated situation.