The Mythic Knight Ranger's KnightZords have been destroyed, and the DARK Patrol is growing stronger thanks to the power of Rainbow Darkness. And what's worse, the DARK Patrol has resurrected Sheldark, the Rangers' arch nemesis. Now the Rangers must achieve a new level of power to fight back and save the universe. No matter what troubles comes their way, the Power Rangers Mythic Knights are not afraid to stand up to what is right to save their world. The Power Rangers Mythic Knights, are now the "Power Rangers Mythic Knight Heroes." Meanwhile, a mysterious plague is threatening to destroy the world. What caused it? How will they stop it? And most importantly, what is it exactly? For those of you are wondering. The Rangers' powers do not come from the Morphin Grid, but from Rainbow Energy.

Sheldon and the rainbow knights with the help of the canine rangers beat Sheldark and his cat monsters but a new evil arises and wants to capture the canine turbo crystals, but this new evil is stop by Tommy (rip Jason David Frank) and the paw patrol and they become the canine turbo rangers