Tae-gu, the ace of a criminal gang led by Mr. Yang, tries to clean up his life for his sick sister and nephew. Then one day, his sister and nephew are killed in an accident by someone who aimed for Tae-gu. Tae-gu decides to take revenge in shock. In the end, he removes the boss of another gang, and runs away to Jeju Island. Without knowing that his gang has already abandoned him, he meets Kuto and his niece, Jae-yeon who look after Tae-gu. Jae-yeon is dying from an illness, while Tae-gu intuitively feels the danger coming close. Things are getting tangled up, and Jae-yeon and Tae-gu, who have no desire to live, start to feel pity for each other.