Twins Todd and Tessa donâ€™t always think alike, but thereâ€™s one thing they both agree onâ€”Gemini Jackâ€™s is their favorite store in the mall. Where else can you find a remote control that works on people, or a mirror that sees 10 minutes into the future? And Jack is even strangerâ€”he glows in the dark, and gives discounts to Tod and Tessa because theyâ€™re twins. Then Jack develops an interest in the other set of twins in Tod and Tessaâ€™s gradeâ€”nasty Ned and Nancy. Theyâ€™re so mean, even their mother is scared of them. Why would Jack want to meet them? Tod and Tessa are about to learn what happens when you introduce your worst enemies to the coolest guy in the universe..