Long ago, the ancient wizard Zordon did battle with the evil witch Rita Repulsa. After long years of battle, he managed to defeat her using five magical power coins. As punishment for her loss, she was sealed in a canister on the Earth's moon. However, before being sealed away, Rita trapped Zordon in a time warp.

10,000 years later, Rita and her minions have escaped their prison and are out to conquer Earth. Zordon, desperate to stop her, has his assistant Alpha 5 recruit five "teenagers with attitude": Jason, Trini, Kimberly, Zack, and Billy. Granted the powers of prehistoric animals in the form of Power Coins, they become the Mighty Morphin Power Rangers.