A Vietnam War veteran, Kigwang 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…

影片讲述了曾是参与越战，获知许久未见的儿子自杀的消息，虽然被告知儿子是喝醉跳楼自杀，但看着悲伤的孙女、儿子身上奇怪的瘀伤，以及没有喝醉的证据，起光于是怀疑儿子的死因不单纯，警方拒绝重新调查后，起光决定自己找出儿子遇害的原因。