 After a woman is fatally bitten by a poisonous Australian snake on a cruise, the insurance investigation team s suspects include her ex, the biologist who presents the TV show "Nigel au Naturel", and a rivaling cruise company which earlier just managed to keep a lizard incident from public knowledge. So Daniel goes on their next singles cruise, where Nigel Hampton also has booked carrying a ferret and a pet snake, as passenger and Zoe fills in for the sick singer. Meanwhile the kids shoot a jealous murder play at home.