Billionaire patriarch Irving Fairchild gathers his family aboard a luxury cruise to reveal who will succeed him. Instead of securing the dynasty, the announcement exposes long-held resentments, competing ambitions and dangerous secrets. Trapped together at sea among Sydney's wealthy elite, the Fairchilds discover how quickly loyalty gives way to self-preservation when power and inheritance are at stake. What begins as an extravagant family voyage becomes a murder mystery in which one passenger will not make it home.