Demelza loves to invent, dreams of becoming a famous scientist and receiving the Nobel Prize. There is only one "but" - an unexpectedly discovered talent. Completely unscientific! Demelza knows how to summon phantoms, ghosts of the dead, like her mother, father, grandmother and long generations of predecessors. This skill requires strict rules, almost like a real science, so the girl immediately tries to set up a couple of experiments. And people with this gift are being hunted. And it looks like Demelza has been chosen as the next target. Only now the hunter attacked the wrong one - Demelza is extremely, extremely inventive.