Matt miller, a successful steamship captain, considers himself an unlikely marriage prospect. Because his trust in women was shattered years before, he could never take a wife. But when he meets Unity Spencer, whose husband, a cruel shipbuilder, was lost at sea, Matt believes he has found the woman of his dreams. Unity has arrived from Boston to manage the family shipping business. She and Matt work together to reap the rewards of the Gold Rush that has turned their adopted hometown of San Francisco into a boomtown. But Matt does not know that Unity has secrets locked deep within her heart...secrets she's afraid to reveal because of fear of losing Matt's love and trust. Can their relationship survive in the midst of these Unbidden Secrets?