In the exciting fourth season, we fast forward for six years and discover that Nikki (played by Esther Smith) and Jason (played by Rafe Spall) are both experienced adopters who have established a lovely small nuclear family and enriched the family through an extraordinary support network. However, when their teenage daughter, Princess (played by Scarlett Reiner), began to crave a connection with their biological mother, Nikki and Jason found themselves facing the ultimate test of parenting skills.