Splatoon 2 takes place approximately two years after the final Splatfest event of the first game, in which the pop idol Marie defeated her cousin and fellow Squid Sister, Callie. After having drifted apart in the months following the event, Marie worries that Callie was negatively affected by the result. After leaving Inkopolis to see her parents, Marie returns home to discover that the Great Zapfish that powers the city has gone missing again, as has Callie. Fearing that the evil Octarians are once more involved, Marie again takes up her role as Agent 2 of the New Squidbeak Splatoon and recruits an Inkling from Inkopolis Square, the player character, to become Agent 4 and investigate. With assistance from Marie and weapons expert Sheldon, Agent 4 makes their way through Octo Canyon fighting Octarians and recovering several stolen Zapfish, including ones powering the Octarians’ war machines, such as the Octo Oven and the Octo Shower. They discover that Callie herself has sided with the Octarians after being brainwashed by their leader, DJ Octavio, who has escaped his imprisonment after his defeat in the first game and once more is using the Great Zapfish to power his new DJ stage, the Octobot King II. Marie arrives with Sheldon and frees Callie from her mind control, and together they help Agent 4 defeat Octavio once more. With the Great Zapfish safely returned to Inkopolis, the Squid Sisters happily reunite and resume their musical career.