Uigang Bang was a typical small business owner leading a normal life until unusual events started to occur. His partner vanished without a trace, leaving a notorious loan shark in pursuit of their company. Following a failed murder attempt on his wife and their child-like dog, they now live in constant fear of a second attack. Uigang confronts the killer, but it ends tragically, resulting in two deceased bodies. Just as he considers turning himself in, he receives a life-changing proposition - become a hitman.