Interstellar agent Sunai travels to a world of beastmen to uncover the secret of immortality. In this female-dominated world, Sunai unexpectedly encounters the starship general, Ming Cang, in heat, and calms his beastly transformation. Ming Cang is captivated by Sunai and discovers that she is a 4S-level female, shocking the entire planet. Disguised as a man, Sunai meets the S-level female Li Xiwei in the underground city. During a cooking competition, her true identity is revealed. Li Xiwei brings the underground city's lord, Lisen, but Lisen has already shown interest in Sunai. Lisen, angered by Li Xiwei's use of a potion, is calmed by Sunai. Lisen becomes infatuated with Sunai and tries to imprison her. However, Sunai escapes and, with the help of Xia Ai, travels to another planet to continue her search for the secret of longevity. Ming Cang and Lisen lead a group in pursuit of Sunai, with several males fighting for her. In the end, Sunai tames them all.