Christmas is a joyous time, but not everyone is merry and bright.

Nicola is a rising star at the top of the corporate ladder, but her personal life is a disaster. Her office affair has lost its allure, and the last thing she wants to think about is Christmas. A night of cancelled trains and festive Christmas carols at Waterloo Station is just about the last straw...

Dmitri loves conducting his pop-up choir during the festive season, meeting people, and spreading joy and cheer around London. But he carries deep secrets from his past that robbed him of his dream to become a concert pianist.

Can their hearts and souls be unlocked by music and moonlight and will they discover the healing power of love?