As space crimes spread across Earth, the planets of the solar system unite to form a special organization dedicated to eradicating cosmic criminal activity. Amid this, the princess of Planet Genesis—a world renowned for its peak scientific technology and military strength—arrives on Earth for a vacation. Seizing the opportunity to strengthen diplomatic ties and ensure mutual security, Earth's organization assigns its top agent, Anna Kamiyama, as the princess's personal bodyguard. However, due to a terrorist conspiracy involving war and criminal acts, the princess is suddenly abducted. Though Anna rescues her from the crisis, an unknown parasitic organism infiltrates the princess's body. Under its influence, the princess undergoes a drastic transformation, beginning to grow uncontrollably and rampaging across Earth with destructive force.