A mentally challenged boy, Dong-gu loves going to school to fetch water for his friends. But he is disappointed, when the school decides to install water purifiers instead.

Nine-year-old Hani is a troublemaker who isn't afraid of anything. A precocious punk, his school friends are all his underlings, and even his family members are under his control. He especially considers his elder brother, HanByul, who often complains of being sick, his greatest target. Until one fateful day, HanByul collapses at home and is rushed to the emergency room and the worst nightmare for any parents becomes a reality - he is diagnosed with cancer. The film is based on a true story.

The story of three Korean outlaws in 1930s Manchuria and their dealings with the Japanese army and Chinese and Russian bandits. The Good (a bounty hunter), the Bad (a hitman), and the Weird (a thief) battle the army and the bandits in a race to use a treasure map to uncover the riches of legend.