Brian Conway is Hayden MacNulty's hero from the start. One Halloween, she knocks on his door, and before long, her puppy love turns serious. His mother, Kathleen, welcomes her with open arms. Brian's house, with its neat shutters and window boxes, isn't just a home. It's family. As the years pass and life pulls them in different directions, Brian remains Hayden's touchstone, her best friend. So how is it that they never seem to get it right when they're together? Not even the child they bring into the world can persuade Hayden to accept Brian's proposals.

But a life-altering challenge can change almost anything, and in one special moment Hayden knows it's time to say, 'I do.'