A Vietnam War veteran, Ki Gwang is an old bus driver. One day, he faced that his son had committed suicide. This was the beginning of his vengeance for the world.

A Vietnam War veteran, Ki Gwang is an old bus driver. One day, he faced that his son had committed suicide and met his granddaughter at the funeral. However, he founds that some friends of his son has been using as his granddaughter as their need, This was the beginning of his vengeance for the world.