But Misselthwaite hides another secret, as mary discovers one night. High in a dark room, away from the rest of the house, lies her young cousin, Colin, who believes he is an incurable invalid, destined to die young. His tantrums are so frightful, no one can reason with him. If only, Mary hopes, she can get Colin to love the secret garden as much as she does, its magic will work wonders on him.