A lone Octoling, Olliver, wakes up in a vast, underground world, meeting up with a boisterous elder known as Craig Cuttlefish. Craig, searching for the third agent of the New Squidbeak Splatoon, Layla, teams up with the lost Olliver, just free of the leash that was kept on the remainder of the Octolings. The two of them take on this unique, strange world, in an attempt to find Layla and get back to Inkopolis.