According to legend, the Star of Rex will someday defeat the beautiful Evil Queen Ya Ge (Qu Ying), whose lover, High Priest Wei Liao (Daniel Wu) had betrayed her. Men have been turned into slaves for women; Star of Rex is destined to restore order to Flower Capitol, the Land of Huadu.
In the opening sequence, 13th Young Master Spring (the beautiful Charlene Choi) accuses Blue Bird (the beautiful Gillian Chung) of stealing her dumb bells (male slaves for sale), who have been freed by master swordsman Crouching Tiger Hidden Dragon (Donnie Yen).
An exciting, high-jumpy athletic martial arts fight ensues, ending when a beautiful enforcer, Red Vulture (Fan Bingbing), shows up. Then, the cutely obese Marshall Edo Bowman (Xie Jing-Jing) also arrives and makes Spring a proposition: Find this particular actor for her, and she'll forgive the debt Spring owes her.
Meanwhile, Crouching Tiger has commissioned Peachy (Edison Chen) to steal a plaque from the queen's palace, a plaque that in the right hands, will lead to the real Star of Rex.
Spring and Blue Bird set out on quests: One to find the actor for Marshall Edo, and the other to find the stone plaque. They come across street performers Charcoal Head, aka "Char" (Jaycee Chan), and Blockhead, aka "Leaf" (Bolin Chen), who are under the tutelage of their adoptive father, Master Blackwood (Tony Leung Ka-fai).
Peachy turns the plaque over to Char and Leaf, with directions to deliver it to Crouching Tiger. They think it's a treasure map. Spring and Blue Bird join up with them, both claiming to be Crouching Tiger. The guys are clumsy, dorky and not too smart; the girls are graceful, articulate and smart.
Crouching Tiger shows up and reveals one of the boys is destined to be king. But first, they must get through Red Vulture, the weird cave people, and finally, Gen. Wai Shing, Lord of Armour (Jackie Chan), who guards the way to the Excalibur sword. An epic battle between Wai Shing and Crouching Tiger ensues, culminating in the revelation of the real Star of Rex.
Jaycee Chan is Jackie Chan's son, his only child with Taiwanese actress Lin Feng-jiao (aka Joan Lin). This was Jaycee's acting debut; he has since worked in 19 more films.
Originally released in Hong Kong as Chin gei bin 2: Fa tou tai kam (The Twins Effect II), Blade of Kings (the DVD title) is a sequel to The Twins Effect, which was released in 2003.
The best part of Blade of Kings is the beautiful women. My lord, they're attractive. The acting is not so great, except for a few high points (Edo Bowman is hilarious).