Here’s an overview of the mode, via Nintendo:
In a shocking twist, Callie – of Squid Sisters fame – has gone missing and her right-tentacle squid Marie tasks the player to search for Callie and the Great Zapfish. Players can use different weapons in single-player mode to overcome obstacles, defeat enemies and take down towering bosses – weapons like the Roller, Slosher, Splatling or the new Dualies. The single-player mode is designed to teach players tips and tricks that they can then use in multiplayer. For more on the Squid Sisters, check out the Squid Sisters Stories here.
Splatoon 2 is due out for Switch on July 21.
Watch the trailer below. View the screenshots at the gallery.