Taking place not long after the events of Power Rangers in Space and set in the fictional universe of Lost Galaxy, four young adults and teens from Angel Grove (Leo, Mike, Kai, and Kendrix) are leaving on the space colony Terra Venture seeking a new world like Earth. They meet a girl who leads them to five mystical swords known as the Quasar Sabers. After pulling the sabers out of a stone, one of the teens falls into a crevasse, but not before passing his saber onto his younger brother. With the Quasar Sabers, the teens transform into the Galaxy Power Rangers and use them to battle space villains from two different parts of the galaxy.