It s not fair. Kim s always lived in the shadow of his younger sister, Eila – which is not how it s supposed to be. Eila is a prodigy, and everyone talks about how smart she is but, in Kim s eyes, she has no common sense.

One day Kim and Eila are walking in the woods, and Eila finds an enigmatic, otherworldly object. Kim thinks it s bad news . . . but Eila begins to commune with it. Kim has every reason to be worried, because soon Eila is able to control the minds of everyone around her – in ways she says is the best for everyone.

Kim needs to put his problem-solving mind to the ultimate test. How can he save his sister, and also save the world from the thing his sister has become and the forces she has unleashed?