A martial arts Instructor is recruited as a bodyguard for an extremely powerful couple. On her first day of duty, her employers are kidnapped. As she searches for the couple, she is led into the deadly world of underground fighting by cryptic messages from the kidnappers, who put her in the ring. There, her martial arts skills are tested, and she gets a few steps closer to freeing her clients. The next opponent that enters the ring will have her facing the ultimate challenge - with hopes of getting out of the ring alive.
The film follows Kristi Jones (Cynthia Rothrock) who, along with her gang, take part in Mafia-run street fights to earn money for her sister's college education. Kristi's sister hopes to become a doctor and pay for Kristi's education.
Lam Chung (Tony Leung), the coach of eight hundred thousand Royal Guards, is a righteous person that is highly regarded by the imperial court and is addressed as a "martial arts mania". One day, Lam meets "Flowery Monk" Lo Chi-sam at Mount Wutai and with their wise appreciation of each other, they become sworn brothers. In order to help his brother to avoid frustration, Lo advises Lam to go to Liangshan County with him, but Lam rejects due to his loyalty.
The film begins as Gaiark Pollution Ministers attempt to break the dimensional barriers that separate the Braneworlds, recycling 13 Barbaric Machine Beasts to help them out. The Go-ongers intercept the Recycle Barbaric Machine Beast Army in their Engines, managing to scrap the 13. However, trio of mysterious warriors appear and their actions result with the Go-ongers losing the primary Engine Casts while being sucked into the Braneworld known as Samurai World (サムライワールド, Samurai Wārudo), a dimension similar to Edo Japan where power is essential. Attempting to find the missing Engine Casts of Speedor, Bus-on and Bearrv while Jumboale and Carrigator work hard to keep the portal between the two worlds open, the Go-ongers pursue the Honōshū.
In Hong Kong, terrorists from Libya blow up a bus which kills the son of the American consul. The Hong Kong Police Force sends Lui Yung and his team of special agents to investigate the case and destroy the terrorist group. On the other hand, Senior Inspector Hui Tat-ming (Simon Yam) of the Regional Crime Unit is discontented by the fact that he is no longer in charge of the case since it has been transferred to the Politics Department. However, Hui secretly investigates alone to track down the terrorists and bring them to justice.
Chi Mo Sai (Yuen Wah) meets Wong (Roger Kwok) in Auntie Fei's (Yuen Qiu) cafe and learns that Wong has a photographic memory. He decides to exploit this by teaching him how to play Mahjong, but Fei, Wong's boss, strongly objects. Despite Fei's objections, Wong learns Mahjong from compulsive gambler Chi Mo Sai. He impresses triad boss Tin Kau Ko (Wong Jing), but falls in love with Tin's mistress (Theresa Fu) and is beaten by his men. Wong goes crazy. Luckily, Fei cures him using Mahjong. Fei wants Wong to beat Tin in the climatic "King of Mahjong" competition.
In the opening scene the protagonist begins to reminisce about his youth and remembers the day he was saved from execution in a raid performed by the anarchist cell he would later join. After reaching a safe house the group begins to teach him the tricks of their trade. He later takes part in several missions, though he continues to have difficulty throughout the film with the violence of his new job.