In high school, Olivia, Tracy and Holly had been known as The Godmothers, and their friendship has endured throughout the ensuing decades. Now, with the death of Olivia's husband, a wealthy Italian Count, and her return to America, the friends decide to reunite on a luxury cruise in the Caribbean. Along with Tracy's college-aged daughter and a two-man crew, they begin their journey uneventfully, enjoying the sun and the warm, clear waters of the Caribbean. Then, a series of devastating events unfolds, leaving the women crewless, starving and terrified. Almost overnight, what was meant to be a blissful vacation devolves into a desperate fight for survival, as they soon find themselves battling the elements, a horrifying attack by drug traffickers, and their own frailties. It is at once a story about the bonds of friendship, the love between mothers and their children, and the strengths we don't know we possess until we are faced with our own mortality.