Fen works in a bookshop and is devoted to her young son, Connor, but she keeps herself to herself. Haunted by guilt and a terrible secret, Fen lives a compromised life, isolated from her family, far from home and too afraid of the past to risk becoming close to anyone. She is constantly looking over her shoulder, knowing that one day the truth will catch up with her. Sean, on the other hand, is enjoying a seemingly perfect life. He has a successful career, lives in his dream home and adores his beautiful wife, Belle, and their six-year-old daughter, Amy. That is until the day Belle announces she has found someone else and wants Sean to move out. Circumstance throws Fen and Sean together. Slowly their quiet friendship turns into something much deeper and the joy they find in one another eventually gives them the confidence to trust and love again. But will the past tear them apart just as they find happiness?