Princess Salina of the distant planet Z Kingdom arrives on Earth to search for her missing younger brother, the First Prince. However, the Death God Legion, seeking her life, stands in her way. Using the martial arts she mastered in the royal palace, Salina fights against the Death God Legion and discovers a signal from her brother emanating from within the monster Thunderbolt. She soon learns that the prince she's been searching for has been captured and transformed by the Death God Legion. Forced to battle her own beloved brother, Salina is overwhelmed and captured by Thunderbolt. Among the enemy soldiers, she also recognizes former retainers who betrayed the kingdom and defected. Now, in front of her former subjects, Salina is subjected to the ultimate humiliation. Can she rescue her prince and preserve her pride as a princess?