As Norah battles alone, yet again, through the bustling December crowds outside Fortnum & Mason, she hears the first notes of a busker's song that transports her back to the most romantic week of her life. Laughing under an Italian sky, knowing they had to part, Andrew made her a promise: If they are both single on Christmas Eve in 10 years' time, they will meet under the clock on Grafton Street, Dublin. Norah has no idea if Andrew will remember, but she has nothing to lose.

Molly and Andrew are just trying to get home to Ireland for the holidays when a freak snowstorm grounds their flight. As the snow falls over the city and over the heads of two friends who are sure they’re not meant to be together, the universe might just have a plan of its own.

On Christmas Eve, 1968, Cathy McLean receives a surprise visit from the lost love of her life and is forced to choose between the one that got away and the one that stayed. On Christmas Eve, 1993, Cathy’s daughter Helena is overjoyed to hear that her boyfriend is about to propose, until a devastating encounter threatens to bring her heartbreak instead of diamonds. On Christmas Eve 2023, a shocking discovery rocks Eve Quinn’s world. The only gift Eve wants this year is the truth. But will it take a Christmas miracle to unravel generations of secrets?

Bea isn't happy. Desperate for a change, she looks to her friends for inspiration. Every single one of them is paired off, perhaps that's what she needs too. So, she starts dating again. But everywhere she goes - amid the hilarious and scarring dates - there's Peter. Good old oddball Peter, her closest friend from university. He's always been firmly in the friend zone but something's happened lately - he seems taller, more handsome and suddenly making him smile is Bea's favourite thing. 

Sasha Greenhope has a very lovely life. Her marriage is solid, her only daughter is delightful and the family business is going full steam ahead. The only blip on the horizon is the upcoming family reunion for her parents 40th-wedding anniversary at Chadwell House—the family pile. Sasha just does not fit with her rich family. Her French mother, Delphine thinks everything Sasha does is a faux pas... And siblings, Adele and Beau, are clearly the favourites, leaving Sasha surplus to requirements.