The streets of London are being terrorized by the legendary Jack the Ripper. The police are confused. Rumor insists that under this mask is hiding the grandson of Queen Victoria, suffering from bouts of violent insanity. However, archaeologist Lady Sarah Kincaid, conducting an unofficial investigation on behalf of the queen, is sure: the heir to the throne has absolutely nothing to do with it. The killer is an expert in history and the occult, bringing unfortunate "moths" are sacrificed to the Egyptian moon god Thoth, in strict accordance with the cruel ritual. Moreover, when the Ripper disappears from the streets of London, Sarah understands: his bloody path is just beginning. And now the killer’s traces lead to Egypt - a land that still holds ancient, dangerous secrets...