Three children wake up in a basement room of a large city hotel. They have been drugged and taken from their beds in the middle of the night. Now they are here. Alone. Where are their parents? Who can they trust? The family has been betrayed to the government and Salt Cottage, their home on a clifftop above the ocean, is no longer safe. Their mother's scientific work has put them all in danger. To protect them, she must let them go. She must put her faith in an old family friend - and in her children's own resilience and courage.