Thousands of years after the seas rose up (literally) and destroyed civilization as we know it, a pair of evolved sea species, the Inklings and the Octarians, found themselves locked in conflict over a land mass that was rapidly shrinking.

Facing the prospect of a never-ending stalemate, the Inkling High Council authorized "Operation Expansion," a covert military program in which small teams of Inklings were deployed across the world to look for other lands that the Inklings could claim as their own.

One such team, led by their intrepid splatoon leader Danielle, struck gold in the form of a large island perfect for colonization. Upon investigation, however, the team discovered that the land was inhabited by a group of four-legged creatures with some crazy ideas about friendship...

(Splatoon x MLP crossover.)