Ten years after a cataclysmic earthquake and tsunami devastates the Pacific Northwest, a new ocean floor reveals itself along the infamous Casacadia Subduction Zone - but when philanthropic billionaire, Wesley Badger, falls unfit to go on a deep sea expedition to explore the new area, rookie captain, Declan Walters must step up and pilot The Alexandria Submarine through the uncharted Pacific abyss. Fellow crew members are reluctant to trust their new captain, especially after a routine dive does not go according to plan...