A veteran gangster looking to retire from a life of crime in the violent port town of Kuam, Korea unexpectedly gets caught in the middle of a mob war with bloody consequences.

Geum Jan Di gets a scholarship to the elite Shin Hwa High School. She is picked on by Gu Jun Pyo, one of the richest and most popular students, but soon Jun Pyo finds himself attracted to her.

The son of a North Korean spy decides to follow in his father's footsteps to protect his little sister. After his father’s botched espionage mission, North Korean Myung-hoon and his young sister Hye-in are sent to a labor prison camp. In order to save his sister’s life, Myung-hoon volunteers to become a spy and infiltrates the South as a teenage defector. While attending high school in the South, he meets another girl named Hye-in, and rescues her when she comes under attack. South Korean Intelligence soon discover Myung-hoon’s activities and begin tracking him, all the while his own government sends a vicious assassin to eliminate him.