In this prequel of Equestria Girls: Prehistoric Park, Zoologist Nigel Marven travels back in time to track down the owner of a pair of giant claws, with some unexpected help in the forms of Fluttershy and Twilight. But as soon as this mission is accomplished, it's on to prehistoric Argentina, where the trio will witness the battle between history's largest predator and its even more gigantic prey. Finally, our intrepid explorers dive into the world's most dangerous depths. In seven different seas in seven different eras, they’ll meets scary sea scorpions, vicious mosasaurs, massive armored fish, and the terrifying Megalodon!