The year is 2125. 40 years since humanity began colonizing Mars. The Martian girl Lili takes part in the Earth Repatriation Plan and seeks to go to Earth. But before her shuttle, Lili is kidnapped. Meanwhile, the scientist Kawanabe researches a phenomenon caused by a mysterious object found on Earth 22 years ago. Believing an identical object exists on Mars, he searches the red planet for it.

Lili (Suri Lin) was kidnapped by people against the Earth Repatriation Plan. Lili learns a terrifying secret about the plan. Meanwhile, it's discovered that the object found on Mars contains tremendous energy. ISDA seeks to obtain both Mars and Earth objects and contacts Kawanabe's (Hidetaka Yoshioka) old colleague's son, Aoto (Masaki Suda) to find the object that went missing 22 years ago.

After her release, Lili (Suri Lin) exposes the Earth Repatriation Plan's secret to the Mars colonists who react with anger. Lili suspects that her mother, Takima (Rie Miyazawa) is behind the Plan. ISDA moves to obtain the Mars object. With help from Aoto (Masaki Suda), Kawanabe (Hidetaka Yoshioka) discovers a function of the objects, and together they seek to get the situation under control.