Born into a family of inventors, Rose spends her time crafting magical creations that can predict the weather, block harmful spells or discern a person's true intentions. When her grandfather begins work on a secret invention, Rose and her siblings set out to discover all they can about it, despite their parents' warnings. But when both he and his mysterious invention are declared missing just as he completes his work, they are plunged into a world of deception and betrayal where they must face their fears and work together as a team to find their grandfather and keep his invention safe from those who seek to use it for their own ends.