Twenty-nine-year-old Kelly Arrington is at a low point in life. Briefly married, her husband abandoned her before the birth of their stillborn child. Lonely and in mourning, she copes by starting an anonymous blog, The Mistletoe Letters, named for her home on Mistletoe Road. She signs each of her deeply personal posts LBH, which only she knows stands not for her initials, but for "Last Breaking Heart." New York writer Tyler Richards is reading her posts. Nursing his own broken heart and trust issues, he finds himself falling for this anonymous blogger. Following a trail of clues LBH has inadvertently revealed, he tracks her down to the small town of Tribe, Alabama. He makes his way there, and begins the search for a Lisa, Lori, maybe a Luanne. Instead, he finds a woman named Kelly to help him track down the mysterious LBH.