Single mom Louisa Austin's young son, Tyler, has Asperger's syndrome, and ever since the day her ex-husband bailed out on the both of them, she's vowed never to risk Tyler's happiness again. Brooding emergency physician Dominic Hurst doesn't do relationships-not anymore. But he's drawn to courageous nurse Louisa, and when her son starts riding at his stables, Dom forms a heartwarming bond with the troubled little boy. If the good doctor can put his heartache behind him and get down on one knee, he'll bring a Christmas miracle to this nurse-in-a-million and to a little boy in need of a friend-and a father. . . .