Two months shy of their wedding, a couple decide to allow each other last flings until their wedding.

Sam and Gray are such a well-matched pair that it is difficult to believe they are brother and sister rather than husband and wife. They both share a love of 1940s movies and dancing, and when they meet Charlie, they have something else in common: They both fall in love with her. Sam must deal with unexpected feelings of jealousy, while Gray struggles to come to terms with her sexual orientation.

After miners disappear in the Namib Desert, scientists find their remains and seek to find what killed them.

They finish each other's sentences, dance like Fred and Ginger, and share the same downtown loft--the perfect couple? Not exactly. Gray and Sam, are a sister and brother so compatible and inseparable that people actually assume they are dating. Mortified, they both agree they must branch out and start searching for love. He'll look for a guy for her and she'll look for a gal for him.