Intrepid traveler Dr. Zoe Weaver returns to St. Elizabeth's after a year's stint in Central Africa as an aid worker. Zoe finds herself immediately drawn to the new Director of Anesthetics, Kieran Morgan. But while he is everything Zoe has ever wanted in a man -- warm, sexy, dependable, and attracted to her -- he's also engaged. And his fiancé, Rebecca, is supposed to be marrying Zoe's adored twin brother, Nate! Kieran is a highly honorable and decent guy, so there is no way he's going to be the first to break off the engagement. What is Zoe to do?