Your honeymoon is cut short when your plane crashes on an uncharted island in The Great Unknown: Houdini's Castle. You awake to discover a madman has kidnapped your husband. To get him back, you'll have to use all your wits to pass his sinister tests and solve the mysteries of Houdini's castle. Along the way, you'll uncover Houdini's secret past and learn about the brilliant apprentice who changed his life. Can you expose Houdini's greatest trick to save your husband and escape the island?