Three young girls - Martha, Clio & Jocasta - meet up at an airport's departure lounge, en route to a backpacking vacation which would take them to Australia, New Zealand, Thailand,and the Himalayas. They become friends and when they separate promise to get in touch with each other when they return to England.
Sixteen years go by before they meet again. One of these girls, upon her return home, alone in a bathroom stall, had given birth to a baby girl (known then as Baby Bianca)which she had abandoned in a linen cupboard at Heathrow airport. It was impossible because of her strict upbringing, to reveal this shameful occurence to her parents and ruin their and her lives. She goes on to have a very successful career.
In the meantime Kate, as Baby Bianca is now known, has been adopted into a happy family but is frustrated and angry that her biological mother does not seem to care about her and sets about to find this mother.