This story is a sequel to Prehistoric Thunder: a Power Rangers story
A few years after Dai Shi was defeated, Casey has been teaching at the same Pai Zhua academy ever since. There has never been any sign of the Rinshi...or any danger for that matter. But for some reason, one by one, those who fought against Dai Shi’s evil forces have been taken to a new land full of magic and ponies. The weirdest thing is that the ponies already know what ‘Power Rangers’ are.
This story is sort of a sequel to Prehistoric Thunder. I suggest you go read that so you know what some of the characters are talking about.