The massive spaceship Terra Venture represents mankind's greatest accomplishment. The giant spacecraft hosts multiple habitat domes with diverse environments ranging from a lake to a mountain range—even a dome with a sprawling city inside—as it takes thousands of human pioneers deep into space to settle a new world. Along the way they are stalked by dangerous aliens led by the insect-like villain Scorpius and his daughter Trakeena. Rising to protect the colony ship and its many inhabitants, a team of Power Rangers from different walks of life unites to become the Galaxy Rangers.