From the introduction: The extraterrestrial container has been breached, and evil alien sorceress Rita Repulsa is free from her 10,000 year confinement! She and her army of space aliens set their sights on conquering Earth, as they were ordered long ago by Lord Zedd. Thankfully Zordon, responsible for capturing her long ago, is aware of her release and orders his robotic assistant Alpha 5 to bring him "teenagers with attitude" to defend Earth from Rita's attacks.