The plot centers on a charismatic radio talk show host, Tom Avery (Bruce Greenwood), and his "mermaid researcher" girlfriend Fay (Emilia Fox). Tom has had a turbulent past with relationships and has had three divorces before the age of 40. Many of Tom's ex-wives turn out to be friends of Fay's. Fay is the opposite from Tom and has an overly high expectation of the men she dates; she expects perfection and wants to emulate her parents' rock-solid marriage. One day, it turns out that Fay's parents' marriage is not as perfect as it seemed and it breaks down suddenly, after 40 years of "wedded bliss". Fay panics and feels insecure in her own relationship and forces Tom to go to great efforts to convince the woman who has become his fiancée that their relationship is different and that they are meant for each other.Wikipedia