Rock Henderson needs a wife—and fast. His dying mother's last wish is to leave this world knowing her son is blissfully married...and producing grandchildren. It's just a small lie to make her eternally happy, one he doesn't think he'll have to make good on until Zelda shows up the week before Christmas with her nurse and her twenty-pound tabby cat. With his ex-fiancée long gone and his wheelchair-bound mother sitting in the living room of his penthouse demanding to meet his wife, he's desperate—and hard-pressed to find a stand-in on such short notice. That is, until he remembers his neighbor in 601E.

Kimberly Jo Stratton is looking forward to a hard-earned vacation the week before Christmas. Her calendar is filled with last-minute shopping, lunch dates, holiday parties and catching up on old friends. There's just one problem—she needs to find someone ASAP to cast the tie-breaking vote to the proposed bylaws change of her condominium association, which is a total ban on all animals. If that change goes through, Kim and many of her closest neighbors will have to move. They're not going to give up their furry children!

Kim and Rock strike a deal. Kim will spend the week as Rock's wife in return for his vote. It seems like a foolproof plan. That is, until Kim's Chihuahua tangles with Zelda's tabby, Zelda's health seems to take a sudden turn for the better and Zelda's nurse does more pouting than nursing, except when she's flirting with Rock. In the midst of it all, Kim and Rock discover that there is such a thing as love under the mistletoe...