'You vanished once before, ran away instead of facing your demons. Cowardly actions, Mr Sparks, not the actions one would expect of a great detective.' Jupiter Sparks is in trouble. Bound and imprisoned. His captor hunts a powerful memory code that, if unearthed, could have devastating consequences. Can Jupiter conquer the ghosts of his past and escape? Jupiter needs help. Step in: Joey Hopper and Cherry Chalk. 11 year old accidental adventurers. But are they up to the challenge?