After a group of biologists discovers a huge network of unexplored caves in Romania and, believing it to be an undisturbed eco-system that has produced a new species, they hire the best American team of underwater cave explorers in the world. While exploring deeper into the underwater caves, a rockslide blocks their exit, and they soon discover a larger carnivorous creature has added them to its food chain.

Six different writers wrote a scene each of this romantic comedy featuring the marriage and turbulent relationship of Joseph and Sarah, with Joseph's best friend Frank trying hard to cope with letting the love of his life marry his best friend.