After finding her boyfriend dead and being accused of murder, Macallan flees New York City and heads towards Alaska where the Leviathan Group has sent her.  But disobeying the immortal's instructions, Macallan chooses to journey to the port city of Homer, instead of Anchorage where she was instructed to go.  There she finds the Hail Mary, a dilapidated salvage boat captained by Jeffery Tulley and his First Mate Oberlin St. Clair who are down-on-their-luck treasure hunters. After reluctantly agreeing to help Macallan find a shipwreck called the Cedar Elm, an assassination team arrives at the harbor and launches a massive assault on the Hail Mary driving Macallan, Tulley and Oberlin out to sea in the middle of a dangerous storm.