Mia and Manny are twelve-year-old twins and they love to share everything. But when Mia finds a new game called The Golden Key, she has no idea what they're in store for. The Golden Key promises a lot but maybe, just maybe, it should have come with a warning. The twins' world is turned upside down and inside out when Mia dares to pick up her controller and touch the red button. Will Manny be able to help his sister from outside the game? And is inside the game really where Mia is?!