Single, but successful interior designer Marcia Watkins is shocked to hear the news of her sister Anna's sudden engagement to a wealthy New Orleans businessman, Justin St. Jean. Skeptical, Marcia agrees to help with the wedding plans. But while staying at one of Justin's mansions, she meets Walter Dufrane, a widower. While passion flares between the two, Walter is unwilling to let go of the past and refuses to commit to anything more that a casual relationship. However, love has other plans when Walter and Marcia work together to solve a dark mystery that's been "haunting" the mansion for over 150 years.