Go Ni suffers an incredible loss when his mother and stepfather die because of Young Min. He later ends up in jail where he meets people who will change his life forever. Go Ni learns from a top tazza player in hopes of getting revenge.
After his mother is brutally murdered by the Triad in Thailand, Soo-hyun is adopted by NIS agent Kang Joong-ho, and he grows up with Min-ki like brothers. Min-ki and Soo-hyun both become NIS agents later on. One fateful day, Soo-hyun meets Ji-woo after last seeing her in Thailand when he was a child. They start dating. One day, Soo-hyun ruins a mission when the suppressed memories of the day his mother died surfaces in his mind. NIS Director Jung gives Soo-hyun an undercover assignment to infiltrate the Triad and Soo-hyun takes the job. Soo-hyun fakes his death and assumes a new identity to become a member of the Triad. With his fake identity and new name, he prowls the back alleys of Bangkok.
All In is a 2003 South Korean television drama series that aired on SBS from January 15 to April 3, 2003 on Wednesdays and Thursdays at 21:55 for 24 episodes. Inspired by the life of professional poker player Jimmy Cha, it starred Lee Byung-hun and Song Hye-kyo in a story about one's man's rise through the fiercely competitive world of casino gambling as he clashes with his rivals over money, success, and love.
The drama was a ratings success in South Korea, with its final episode reaching a peak viewership rating of 47.7%, which is the 42nd highest-rated Korean drama episode of all time. It also won several awards, notably the Grand Prize for Lee Byung-hun at the 2003 SBS Drama Awards.