Former criminal profiler turned con man, Nam Han Joon. Cons he pulls involve him posing as a fortune teller and operating under the cover of Minamdang, a place where fortunes are told. Because of his good looks and charming demeanor, he has a steady stream of customers. He engages in dishonest business practices to bilk his clients, yet he also actively assists them with their problems. His services also include assisting customers in whatever way they may need. Both Soo Cheol and Nam Hye Joon work with Nam Han Joon. Soo Cheol is the owner of a private investigation firm, and Nam Hye Joon is Nam Han Joon's younger sister. An expert hacker, she ranks among the best of her kind. For three years, Han Jae Hee has served as a detective. She cares deeply about doing good work and approaches life with optimism. And yet, Nam Han Joon and Han Jae Hee end up romantically involved.