Readers of Milan's Flash magazine enjoy the articles written by Sibilla, a chronicler for the occult who investigates vengeful spirits, poltergeists, alleged wizards and other supernatural phenomena that make her skeptic colleague Leonardo Verga cringe. The beautiful Italian writer never hesitates to embark on dark cases, guided by her esoteric knowledge and the magic ring inherited from her ghostly mentor, the legendary Cagliostro. But who is Sibilla really? Bit by bit, Leonardo will discover the truth, during their travels in the disturbing shadows of enchanting cities like Paris, Milan, Florence and Bangkok, where this mismatched but tightly-knit duo will be confronted with the most abominable of supernatural threats...