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In the year of our Lord 1521, Pope Leo X issued a bull stating that Rome should never be left in darkness. Five centuries later, bad weather caused a power station to malfunction. To repair the damage, the electricity supply had to be cut off for a day. And Rome was engulfed in darkness, awakening evil. At dawn, local residents heard a message from transistor receivers: "We have captured Rome, Rome is ours. The defenders of law and order have already come over to our side." Meanwhile, amidst the chaos and panic, the shadow of a ruthless serial killer moves silently through the city, leaving clues for Marcus and Sandra. But will the anomaly specialist and former photo investigator be able to identify the monster?