Forced to choose between the woman he loves and the dangerous, fast-paced life of motorcycles, what will our hero do? Will he toss the bike aside and pick the girl? Or will he leave the girl in favor of the bike? Or is there a chance for some sort of compromise?

Mysterious Heroes centers around Lau Tien, master of the deadly 13-Sword Style. Thrown into prison by a group of jealous enemies, the 13-Sword Style is rarely spoken of, let alone seen, until 20 years later, when a second swordsman going by the name of Lau Tien proves to be the world's second 13-Sword expert. Action-packed martial arts chaos ensues when the enemies of the original Lau Tien vow to destroy his successor.

A band of fighting Ming Dynasty loyalists branded as enemies of the state are driven underground following the burning of the Shaolin Temple by Qing Dynasty officials. Due to a misunderstanding, Shaolin kung fu prodigy Fong Sai-yuk is duped into helping Qing agents to capture leading Shaolin rebel Hung Hei-gun. Upon discovering his mistake, Sai-yuk teams up with the remaining rebels to free Hei-gun before his planned execution. Plotting to stop them is General Che Kang, a formidable Tibetan kung fu master who commands an army of fighters including four deadly Tibetan llamas.

Two CIA agents, a kung fu master and a suave womanizer, track the stolen formula for a super-sterility drug from Spain to Hong Kong, battling Neo-Nazi terrorists and a Vietnamese spy ring for its possession.

After Tien's parents are murdered, he is saved by the KSS and trains to avenge them. 10 years later, he is ready to save the earth using the powerful Iron Superman to defend Earth from evil invaders led by the King of the Flying Robot Empire, Fei Long Ri.