In Too Deep is the first Mythos Pack in The Innsmouth Conspiracy cycle for Arkham Horror: The Card Game.

Since awakening in a dank and dismal pit on the Atlantic coast, your memories of your time in Innsmouth have been scattered and difficult to piece together. Why did you come to the town of Innsmouth? What exactly transpired between your arrival and your nightmarish experience in the tidal tunnels? What is the connection between the Esoteric Order of Dagon and the swarming deep ones? These questions and more will have to wait—Innsmouth may already be slipping beneath the waves!