In the exciting fourth season, we fast-forward six years, discovering that Nikki (Esther Smith) and Jason (Rafe Spall) are experienced adopters having built a lovely little nuclear family, enriched by an extraordinary support network. However, as their teenage daughter, Princess (Scarlett Rayner), starts to yearn for a connection with her birth mother, Nikki and Jason find themselves confronted with the ultimate test of their parenting skills.
When a romantic getaway to Paris takes a dark turn with the sudden disappearance of her boyfriend Tom aboard a train to the south of France, Alice is plunged into a web of intrigue and danger, uncovering shocking secrets about the man she thought she knew
