Post war Japan is at its lowest point when a new crisis emerges in the form of a giant monster, baptized in the horrific power of the atomic bomb.

In the summer of 1989, four kids in Tokyo witness the emergence of the turtle kaiju Gamera, who bravely stands up against giant human-eating monsters.

The Rangers come face-to-face with a familiar threat from the past. In the midst of a global crisis, they are called on once again to be the heroes the world needs.

As the threat of giant unidentified lifeforms known as "S-Class Species" worsens in Japan, a silver giant appears from beyond Earth's atmosphere.