Kim Heung-soo

Jang Bo Go (Choi Soo Jong) was a slave from Shilla (a Korean dynasty that lasted from 57 B.C. until 935 A.D.) He was sold in China during the Tang Dynasty, where he was trained as a gladiator-slave. Through hard work and perseverance, he made it back to Shilla and became a successful sea merchant. The sea passage at the time was plagued by pirates and Jang Bo Go went head to head with them in battles and managed to keep the pirates at bay. (imdb)

Seok Joo hates his brother Seok Hyeon. He was a troublemaker the whole time and now he just runs a fish shop. He thinks his mother passed away because of him. He hates school. He hates Chan Ho who keeps clinging on to him. He hates Hyeon Tae who bullies kids around. One day, he meets Jong Beom. Jong Beom asks Seok Joo to get rid of what has been giving Jong Beom a headache.