A trio of ninja trainees become Power Rangers to defend their school after it is attacked by aliens.

Three rebellious students are the last ones remaining at their ninja academy after evil aliens attack the Earth. With mankind at the brink of destruction, the fate of the world lies in the hands of these unlikely heroes. Their ninja master teaches them to harness ancient mystical energies that transform them into Power Rangers.—PrometheusUFO

After their school gets sucked up into the sky and their fellow ninja students are kidnapped by a ruthless ninja warlord named Lothor, three students in training are resulted as the last remaining uncaptured. Desperate to save the world, their ninja master bestows upon them the abilities to becoming Power Rangers and fighting Lothor and his armies.—Blazer346