Adam's foundation board acquaintance Monique Sims is hospitalized after an incident aboard yacht. When Steve, Danny, Junior and Tani find and board it, Steve realizes they must quarantine themselves having found over a dozen passengers and crew died from a mystery disease. The sample Steve sends by the helicopter that can't take them back show it's a biological weapon not even known to the CDC. Monique isn't infected, but according to her own story blaming one Marko both should be dead, but his corpse is found aboard, clobbered by the dying other guests. All depends on finding the cure, which must exist, but Monique, who knows, kills a nurse to flee after her client, who wasn't served, demands his money back fast. Meanwhile, supposedly terminal honesty is interesting between the 'last' champagne-drinking restaurant partner detectives.
—KGF Vissers