Adventure in the world of imagination! When Crimson the main character starts his summer, he has nothing to do. When he goes down to the secret basement of his home, he discovers a machine that is able to make his imagination into reality. He shares his secret with his older sister, Amber. Together the two make their own Terrabithia/Narnia. But when they make a mistake into adding their fears in their world, they will have to start a new adventure