Layla O’ Reilly (Jessica Lowndes) is an aspiring designer who’s always dreamed of being a December bride. But when her fiancé leaves her — and winds up engaged to her cousin — she swears off love, focusing on advancing her career instead. When Layla tries to land her dream job as a house stager for Stanley Malcolm (Kurt Evans), owner of a prestigious local real estate company, he abruptly dismisses her. As Christmas approaches, Layla, urged by her aunt to let bygones be bygones, accepts an invitation to her cousin’s December wedding to her ex-financé.
Without a date to the wedding after her friend falls ill and cancels, she reluctantly agrees to go with her ex’s friend Seth Murphy (Daniel Lissing), a handsome investment banker who’s had a longtime unreciprocated crush on her, and is the guy responsible for introducing the bride and groom. When Layla’s family pities her at the reception for having been jilted, Seth, in an effort to save her from the embarrassment, gets carried away and announces that they’re engaged. A mortified Layla is forced to go along with it after learning that Stanley Malcom’s interest in her work may well be piqued now that she and Seth, his friend and client, are a couple. And when Seth is roped into entering his house in the annual Christmas Tour of Homes by his boss’s wife, he convinces Layla to turn his bachelor pad into a Christmas wonderland.
As the tour opening draws near, Layla works frantically to create a masterpiece of design and decorating that will hopefully beat out the home her ex-boss is decorating across the street, while impressing Stanley Malcom, one of the tour’s judges, and convincing him to hire her. Working side by side to adorn the house, Layla and Seth really get to know one another and soon, the faux couple begins to develop real feelings for each other. After Stanley declares Seth’s house the winner of the contest and offers Layla a job, she and Seth agree that it’s time for their pretend engagement to end, so with their families and friends assembled for a holiday celebration, Layla and Seth begin to act out their “break-up.” But when Seth unexpectedly drops to his knee and proposes, the young interior designer must decide if she’s ready to let herself fall in love and finally become the December bride she’s always wanted to be.