Sungju Lee have a prominent military dad, a mom that is a teacher, and a dog named Bo-Cho. He lives happily under the wealth and enough education for a military-family child like him. He'd always wanted to be like his military dad.
Everyday, he went to school like other children: learnt History, Taewondo, etc. But suddenly, his family have to go onto the "family vacation" and he discovered that other cities are so much different than the capital of North Korea: they have an extreme poverty.
No longer his parents didn't come back like promises, he became a kotjebi, a street, homeless boy who steal stuff from others. He stayed with Young-bum, and made a gang for his own to steal and collect what they need