The worlds of Equestria and the Digital World are both worlds that are homes to amazing creatures, something beautiful locations, and believe in the power of friendship.
Each of these worlds are linked to their own human worlds, which have a group of young humans that are ready to not just protect their own world but the Equestria and Digital World as well.
Now a new evil has shown up that threatens all four worlds, Can the humans untie and save all worlds.

This takes place after the 6th Tri movie from Digimon Adventure Tri and after Sunset's Backstage Pass for My Little Pony: Equestria Girls.