The BAFTA-wining drama about romance and second chances returns with yet more secrets and surprises. 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. Gillian finds herself spiralling into a dark place as old skeletons resurface, while Caroline's fractious relationship with John leads her to make bold decisions involving Kate and their future. Meanwhile, Lawrence struggles to accept his mother's choice of partner and Raff breaks some news to the family which will change his life forever. As secrets from the past come tumbling out and family members adjust to changing relationships, can Alan and Celia find the long-awaited happiness they deserve?