SERIES 1: Childhood sweethearts, Alan and Celia are both now widowed and in their 70's. When their grandsons connect them through the internet, they rediscover feelings for one another that just might have blossomed 60 years ago. Still, it's never too late...or is it?

SERIES 2: Following his heart attack scare, reunited childhood sweethearts Alan and Celia are determined to live life to the full. However, as they begin to move on and enjoy the next stages of their relationship, it becomes clear that the rest of their family aren't as content with their own lives.

SERIES 3: This series sees Celia and Alan's marriage tested by revelations about an incident in his past. As his daughter Gillian tries to deal with the dramas of her own complicated love life, Caroline has settled into happy domesticity with pregnant partner Kate. But her life is thrown into turmoil by sudden and tragic events...