When earthquakes shake Japan, Professor Saotome believes the Dinosaur Empire is responsible. Michiru departs in the Command Module to investigate but is quickly shot down and injured; the culprit turns out to be Megazaus. Team Getter Robo seeks revenge for Michiru, but first they must navigate the damaged roads and find a doctor for her. Once Getter Robo is assembled, they must pursue Megazaus underground and defeat him before he destroys Japan’s cities.