Disturbances in the magic of Equestria causes rifts between worlds. One unlucky hiker stumbles into one such rift and finds themself in a new body and in a new world.
When John Radderson ended up as an anthropomorphic alicorn Princess Twilight Sparkle, she set off a chain reaction that transformed her classmates into her pony friends.
AJ Smith, was approached by one Rebecca Haddington, who was reporting her brother Tom missing. While investigating the disappearances, AJ ends up buying a brown Stetson from the Merchant.