When seven-year-old Sophie Crue and her father left Guam, her scientist mother stayed behind, working for Corpus on Skin Island. Much later, seventeen-year-old Sophie gets an emergency email from her mother. On Guam, no one will fly Sophie to mysterious Skin Island. Jim , a childhood friend, reluctantly agrees to take her and the plane is damaged on landing. Sophie goes with island resident Nicholas to find her mother, but becomes suspicious of him. Sophie slips into a room to find Lux sleeping – a girl who looks exactly like her.