After the defeat of demon Maligore, Tommy, Adam, Tanya and Katherina graduate from school and prepare to resume life as normal people. Twelve-year-old blue Ranger, Justin, starts at Angel Grove High. Space pirate Divatox, enraged by the defeat of her beloved Maligore, seeks revenge and wants to conquer the universe. After Zordon and Alpha 5 leave, the Rangers receive help from two new mentors: Dimitria and Alpha 6. With the help of the Blue Senturion, an intergalactic police robot, they must prevent a dark future.