The Contessa Lines cruise ship, the Nerissa, is the nexus for a disparate cast of nefarious factions. Two cunning and cold-blooded killers have smuggled themselves aboard, disguised as their murder victims, their motives unknown. And members of the Foundation, a mysterious cult, 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...