Penny has never met anyone smarter than her. Thatās par for the course when youāre a savantāone of less than one hundred in the world. But despite her photographic memory and super-powered intellect, thereās one question Penny doesnāt know the answer to: where did her father go when he left her and her mother years ago? On Pennyās 21st birthday, she receives a card in the mail from her father, just as she has every year since he left. But this birthday card is different. For the first time ever, thereās a return address. Penny may not know much about the world beyond The Institute, the special school she has attended since her abilities became clear, but now seems like the perfect time to break free of her safe existence and start to really live. What she doesnāt realize is that the real world is more complicated and dangerous than she ever imagined...