Fifteen-year old Mia lives with her dad in a small rural community. When she discovers that she's pregnant she doesn't know where to turn - her elder sisters have left home, her mum left when Mia was six, her boyfriend, Will, is too scared to be anyhelp and her dad tries to push her into an abortion. Backed into a corner, she runs away and joins two women on a canal boat. Nobody can find her now but she discovers that the women have their own tragic stories. A fire on the boat makes her realise that she must take responsibility for the baby and herself and that home is the most likely place to get help. Her mother re-enters her life and Will's mother involves herself. Mia learns about love and realises how much her father has done for her.

Baby Blue" picks up Mia's story (begun in "Blue Moon") just after the birth of her baby. Mia is sixteen now, and still living with Dad, although this relationship becomes increasingly under strain. Not only is Mia having to work out the complicated emotional and practical implications of being a mother when she herself is still a child, with huge emotional needs of her own, she is also having to negotiate new relationships with the adults and young people around her.