Sam's stories about how he became a Changel are starting to test Sue's patience. The idea that the Fae (the origins of ancient myths of fairy folk from Ireland to New Zealand) are an ultra advanced race who built the secret base under Renwick house defies Sue's quest for sanity. But Sam knows that their safe house will not be safe for long, and very soon Sue will be brought face to face with the source of his fears, whether Sue believes in them, or not.