18세의 바다

Seok Joo hates his brother Seok Hyeon. He was a trouble maker 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. Seok Hyeon doesn't want him to meet Jong Beom but Seok Joo who despises even the thought of becoming like his brother, continues to meet him. Then he gets involved in a terrible incident.