Plot
Jung Se-ro (Yoon Kye-sang) is a hardworking young man who works multiple part-time jobs while studying for the foreign civil service exam. His father is a petty criminal and a con man, and their family lives a transient life because of his deals, currently staying in Thailand.
Despite wanting an honest life for himself, Se-ro's dreams are shattered on the night of a glamorous jewel exhibition opening in Bangkok. His father dies in an incident involving stolen diamonds, and because Se-ro was at the scene when another man was shot, he is accused and arrested for murder. After spending five years in a Thai prison, upon his release he takes up a new identity and becomes a con man just like his father. He joins a ring of jewel smugglers led by Park Kang-jae (Cho Jin-woong), with whom he shares a brotherly bond. Kang-Jae was raised like a son by Se-ro's father, who taught him all the tricks of the trade. But Kang-Jae has harbored a lifelong jealousy towards the real son, which is stoked further when the woman he loves, smuggling accomplice Seo Jae-in (Kim Yoo-ri) also falls for Se-ro.
Then Se-ro meets Han Young-won (Han Ji-hye), the cold-hearted heiress to a jewelry brand. She was madly in love with her fiancé Gong Woo-jin (Song Jong-ho), and had closed herself off after his death. But Se-ro draws her out into the world, while Young-won gives him a reason to live when he had all but given up. They fall in love, not knowing that the man Se-ro was accused of killing had been Young-won's fiancé. His love for her becomes his punishment, but also his salvation.
