In an underwater city, a young girl takes care of a large egg she holds carefully in her arms – a treasure that she believes is an angel's egg. One day, a boy with a gun arrives in search of a bird he saw in his dream and, at first, it seems as if feelings of sympathy are developing between the two.
Caleb, a 24 year old coder at the world's largest internet company, wins a competition to spend a week at a private mountain retreat belonging to Nathan, the reclusive CEO of the company. But when Caleb arrives at the remote location he finds that he will have to participate in a strange and fascinating experiment in which he must interact with the world's first true artificial intelligence, housed in the body of a beautiful robot girl.