Song Seo-Yeon

Retired gang member Gang-Pil tries to find another job rather than running an illegal inquiry agency to win custody of his daughter back. In order to pay for the lawyer, he accepts Lee Munhee's request to follow the Entrepreneur Park Yongdae, but soon after both Park and Lee go missing and Gang-Pil starts digging in.

It follows the story of Lee Dae Gil, a man of high birth, whose family was ruined when Won Gi Yun, a slave, burnt down his house and escaped with his sister, Un Nyeon, who was in love with Dae Gil. Driven by his desire for revenge, he survived his harsh years on the street and made his name as a slave hunter, dedicated to his pursuit to find Un Nyun, his first and only love. Song Tae Ha is a General of the Army who became a slave after being falsely accused of a crime he did not commit and finds himself on the run from Dae Gil's relentless pursuit. Both men become entangled in a love triangle with Un Nyepn, who is no longer a runaway slave, but Kim Hye Won, a nobleman's daughter.