Grave waters

Two cunning, cold-blooded killers board the cruise ship NERISSA disguised as an elderly couple, with a deadly armoury at their disposal courtesy of the Russian Mafia. Meanwhile, members of a mysterious cult called the Foundation have infiltrated the passenger list, with their own sinister agenda to take over the ship. When they strike, they disrupt the on-board wedding ceremony of police officer David Spaulding. Can the ship's captain, aided by David and his new friend, author and anthropologist Richard Black Wolf, regain control of the NERISSA before it's too late?