This story is a sequel to Equestria Ninja Girls Happy New Years
Sunset is going to Equestria with the Ninjas and invited the Digidestined and Team Shine to join them. During their visit, Davis and the D-3 Digidestined learn a new way to digivolve in this new world. But when creatures of darkness appear all over Equestria, they learn of an ancient evil returning to Equestria.
Also, They'll soon learn there's more to the multiverse than they thought as they meet a dimension traveler as well as three other kids with their own Digimon.