London, 1815. Cassandra Hazeldon is on the run. Under duress to marry a repellent friend of her uncle, Cassandra has made her escape, but now she is very much alone. With luck and quick thinking, she finds a refuge in a grand mansion in Mayfair, and a protector in Lord Irlam, or Hal to his friends. Posing as a friend of Hal's sister, Cassandra is swept up into the social whirl of a Brighton summer. But the attraction between her and Hal is starting...