Two years have passed since the hero of Inkopolis: Tokuma Sugimori saved the world from DJ Octavio, but the terrors don't end there. Suddenly, Callie has gone missing and the Big Zapfish is gone again. With this reported by Pearl and Marina, Tokuma is saddened to hear such news. Suspicions surround her as to what could have happened to Callie: Marina is oddly like an Octarian/Octoling and they were responsible for such treachery last time. Could it be true?
"Psst!" Someone in the distance calls for Tokuma and she comes closer. This Inkling dives into a hole leading to who knows where. Our hero examines the hole and sees green ink left from that person. Without another word, Tokuma dives in. The hole leads to a whole new area of Inkopolis: perhaps it's a secret place.
"I've been waiting for you, Tokuma Sugimori." said the girl behind an umbrella. When she reveals herself, Tokuma is not so shocked because she knows of Callie's disappearance. Marie is the girl that called for our hero.
"Not so shocked?" Marie asked.
"No. not really." Tokuma said surveying the area.
"I really need your help to find Callie."
"I was planning on helping anyway!"
Marie smiles knowing she can count on Tokuma to save Callie and Inkopolis. As the adventure goes on, Tokuma is overwhelmed by enemies near Sector 5 and Maire sends a distress signal to the hero's cousins. Only one will answer the call.