The drama tells the story of a life-based swindler who accidentally intervenes in the country's "privacy (private life)" and uses various scams to survive and fights against a large company like Goliath (note: "Goliath" is a legendary giant) to expose the country's huge "private life". The drama begins with the story of a family that has to become a swindler in order to survive in Korea after the changes of the times. The drama will project the joys and sorrows of ordinary citizens in the Republic of Korea through the fraudulent life of a livelihood-based swindler. [Seo Hyun] plays [Cha Joo-eun], a livelihood-based swindler who grew up under the care of swindler parents and is naturally familiar with various scams and is good at disguise; [Go Kyung-pyo] plays [Lee Jung-hwan], a mysterious man who pretends to be the head of the development team of the large company "SL Electronics" and approaches the heroine Cha Joo-eun; [Kim Hyo-jin] plays [Jung Bok-gi], a professional swindler who ranks in the top 1% of the scammers in Korea; [Kim Young-min] plays [Jung Bok-gi's] swindler partner [Kim Jae-wook].