Swordsman Hero flees from a Japanese killer brigade to the USA, leaving his wife and son behind in China. On the run, there is a fierce battle with an American slave driver and the Japanese killer commando, and since then Hero has been missing. 16 years later, Sword, his son, sets out on a search. When he truly faces his living father, the two have to realize that the Japanese killers have not stopped looking for Hero and the merciless fight continues...