Tae-jin, who lost motivation in everything and drifted away, receives an offer from Shin Sang-yoon, the former captain of the wrestling club at Dangyeong high school, and eventually compromises with reality and enters the world of fists. <br><br> And as he adjusts to that world, he gradually begins to feel that he is falling into the abyss... <br><br> The saddest story of the Dokgo series unfolds.