Sung-soo has everything a man could want: a beautiful wife and children, a comfortable home and luxury car, and plenty of money in the bank. When he learns that his estranged brother, Sung-chul, has gone missing, haunting memories of their troubled past urge him to visit his brother’s apartment in search of answers.

Two brothers try to break free of the gang life, only to be attacked in retaliation for their decision. The younger brother is seriously burned and dying in a hospital, which drives his older brother to take vicious revenge.

Author Juyoung recalls the moment when he saw the dragon's tooth – the traces of war. His memory deepens, and he visits Nuri to find traces of his dead student. People beyond time, all those memories of love allow us to live despite the traces of frozen wounds.

North Korean family story defectors crossing the Dooman River.