Nam Han-jun, who used to profile criminals, now works as a fraudster. For his scam, he disguises himself as a fortune teller and runs the cafe Minamdang. Han-jun knows how to attract customers with his attractive appearance and smooth talk. Although he scams his clients for money, he also meddles in their affairs and helps to solve them. He is helped in this by his sister Hye-jun, an extraordinary hacker, and private detective Kong Su-cheol. On the other hand, the cafe also attracts the attention of police inspector Han Jae-hui, who finds it suspicious.