With Christmas approaching, Eddie is worried about what this job loss will mean for him and his family and he decides to talk to his former boss. Although the thought never occurs to him, the nuclear company is convinced that he will sue. As a preemptive countermeasure, they offer him and his family (along with Audrey Griswold and his Uncle Nick) a free vacation to an island in the South Pacific. While on holiday they go on a boat ride. While Eddie attempts to catch a shark, they get lost and eventually shipwrecked on an isolated island.