Kyle Keeley is the class clown and a huge fan of all games - board games, word games, and particularly video games. His hero, Luigi Lemoncello, the most famous and creative gamemaker in the world, just so happens to be the genius behind the town's brand-new super library that is as much a home for tech and trickery as it is for stories. Kyle is lucky enough to win a coveted spot as one of twelve kids invited for a puzzle-packed lock-in on the library's opening night, hosted by Mr. Lemoncello. But when morning comes, the doors stay locked. Kyle and the other kids must solve every clue and figure out every secret riddle to find the hidden escape route . . . !