Gate of Ivory, Gate of Horn is a comic-apocalyptic rock opera by James A. Levin and Linda Eisenstein that ponders why everyone seems to be asleep. Cassandra, radical psychic and web mistress, can’t understand why her 100% accurate on-line prophecies are being ignored. In the meantime, Dr. Somnus and his Lethe Institute for Lucid Dreaming try to discover the conspiracy behind the sleep plague.