Watch Jekyll Island Full Movie Free Online 123Movies. To Professor Alex Madison, the world's greatest jewel thief, stealing is a fine art and the ultimate thrill. Now, he faces his greatest challenge. On a remote island off the coast of Georgia, a senator's daughter is getting married and there's a secret cache of priceless diamonds hidden in her wedding gifts. For others, the risk would be unthinkable. For Alex Madison, it's too enticing to resist.