If you could see the truth of the world, do you think it would change you? Angela Brown has discovered some old notebooks belonging to Sir David Brewster, the famous 19th century Scottish inventor of the kaleidoscope. She has used them to create a wondrous new scientific instrument, revealing some fundamental truths about the interconnectedness of the universe. But now others want it too, and Angela finds herself part of an epic story that starts in the Isle of Skye and finishes in the moons around Jupiter at the start of an exciting new chapter in humanity's history.