The twins of dragon and phoenix secretly love the long-legged peach sister and desire to taste the union.

The film follows a pair of fraternal twins, a brother and sister, who gradually develop a taboo intimate relationship within their family environment. The sister, an alluring figure with long legs and a peach-like allure, develops an intense desire for her brother and ultimately succumbs to sneaking a tryst, attempting intercourse. The story revolves around the siblings' secret lust, filled with tense and thrilling clandestine encounters, exploring the psychological and physical conflicts of incestuous taboo, while depicting the breakdown of family ethics and the release of passion.