Cara doesn't do sexy and she only does 'Happy Christmas' under duress. She is, after all, a serious musician, and her stubborn streak is born from her struggle to recover from a serious injury. Javi lives for escapist fun - in his music, and in his life - especially since he's always failed at life's more serious challenges, including marriage and fatherhood. Javi and Cara are forced to record a Christmas single together, but neither of them have plans to spend any more time with each other than they absolutely have to. With Christmas traditions that couldn't be more different, and outlooks on life that are worlds apart, the chemistry just shouldn't work. But the magic of Christmas can bring even opposites together...