The Twins Effect II follows the story of a young orphan boy named Prince Stan (played by Jaycee Chan) who lives as a slave in the Flower Capital. He dreams of one day rising up against the sexist regime and overthrowing the Evil Queen (played by Donnie Yen).
One day, while working in the castle, Prince Stan discovers a hidden chamber where a mythical sword called the Star of Rex is hidden. This sword is said to have the power to restore balance to the kingdom and overthrow the Queen.
As Prince Stan sets out on a quest to find the Star of Rex and fulfill the prophecy, he meets a band of rebels who share his vision of a better future. Together, they face numerous obstacles and battles against the Queen's army, including her loyal followers known as the Kamas.
Throughout the movie, Prince Stan struggles with his identity as the Star of Rex and the responsibility that comes with wielding the powerful sword. He must also navigate his feelings for the Queen's daughter, Princess Yan Fei (played by Charlene Choi), who is torn between her loyalty to her mother and her growing feelings for Prince Stan.
As the rebels and the Queen's army clash in an epic final battle, Prince Stan must make a choice that will determine the fate of the entire kingdom. Will he fulfill the prophecy and rise to power as the Star of Rex, or will the Evil Queen continue to reign and keep men as slaves forever?