In 1930, sea captain Russel Marsh experienced a life-altering revelation, and for the next 93 years, he was under the control of a Great Old One. During this time, he carried out horrific deeds for the Esoteric Order of Dagon. Now liberated, he seeks a method to travel back in time to undo the atrocities he was forced to commit. However, the cult has its own agenda and is determined to eliminate him at all costs.