Claire, between the age of 10-13 I imagine, is interested in whales. Her father takes her out on the yacht to try to see some on their journey south. They are out near Sydney. A storm comes up and due to the whales surfacing under them, the mast breaks and her father is tossed out of the boat. She throws him the life raft and sees him go under with it then never thinks of him again for the rest of the story, not even to wonder if he's safe or alive.
She bangs her knee, breaking her leg, so is pretty feverish and so on. But when she goes in the water she is fine so she spends most of her time there. A pod of humpback whales accompany the boat and she drifts south with them. She spends a lot of time in the water, at first at the end of a rope, then a baby whale takes her on its back and she swims with him. The humpbacks first come after a shark nearly gets her. The shark is accompanied by cold water, but dolphins send it away then she is protected by a humpback's bubbles. After she swims on the baby, the others let her ride on their backs but they run away when killer whales arrive, orcas. She sees one eat a seal, but they don't want to eat her and make her their friend. Later the humpbacks return and baby whale is very happy. Because he is so joyous they end up near the orcas, but when they see Claire is with the baby they don't eat him. Baby is able to run back to his pod and Claire stays with the orcas who get her back to her boat. She spends days and days swimming with the whales. When the water gets too cold she goes back to the boat. Then she sees a whaler. It is going to shoot baby whale so she jumps into the very cold water and leaps up on baby's back, sending the harpoon awry when he sees her. Baby and the pod submerge and she never gets to say goodbye. She is almost dead but baby's call makes her rise to the surface. She strands on the ice and sits under the cliff. All the while she had thought she was going there for a reason, and now has fulfilled it.
Claire wakes up in hospital and is told she was found not in the Antarctic but just further down the coast of Australia beneath a non-ice cliff, and no icebergs are meant to be in that region. They think she was probably never that far from land. Her parents don't believe her story and think she was delusional from the fever and cold and broken leg. But later her father finds some disturbing evidence - her wetsuit shows was in the sea a lot, there is a rope out the back like she said she floated from, and they are told there are still some whaling ships posing as research ships out there. But at this moment of their possible capitulation she disagrees and says must have been delusional, keeping it her own secret. Or perhaps she was delusional, in a dream fever, or in a shamanic way, accompanying the whales in spirit.
Whether she really swam with the whales or not, it was a pleasant read and an interesting look at whales and the life of the sea. I thought it was interesting the way different predators were represented - sharks vs killer whales vs humans.