Kathryn (Kit) Jennings is a single 30-something living in Toronto with her BFF, Mel Melrose. Kit has completely given up on love and finding Mr. Right and has decided that ìSex with the Single Exî is the only way to live that will protect her heart from being broken again. In a sequence of events, Kits finds herself in possession of three engagement rings, all with marriage proposals attached. Marc, the construction guy, who adores Kits from the first time he sees her. Derek, the investment banker, who sweeps Kit off her feet just to break her heart then wants her back. Rob, the bike courier, who sleeps with every eligible woman on his courier route while supposedly dating Kit exclusively, and Kevin, the up and coming rock star, whoíd like to get to know Kit better before she runs off and marries someone else.