Oh dear, Off the Hook just announced that the famous squid sister Callie had gone missing! This isn't good. You and Callie had been close friends when you were young. You looked away from the huge tv screen, and saw a Lady vanish into some sort of sewer. You wanted to follow her for some reason.. so you did. You ended up in the.. Octo Canyon?

Marie looks at you, waving her umbrella over her shoulder. "Ah, there you are, Agent 4."

..wait, what does she mean by 'Agent 4'?