Deep below the Atlantic Ocean, guarded by hundreds of dolphins, lie the astonishing remains of an Atlantis-like lost city called Marinth. Its disappearance has confounded scientists for years until now. Marine architect Hannah Bryson has unearthed a legendary artifact that might hold the key to unlocking the city's long-buried secrets. But Hannah's discovery could have dire consequences for the modern-day world and there are some people who will do...