Haunted by an urgent voice she hears each time she reads a book by Carlos Castaneda, world renowned anthropologist-turned-writer and TIME magazine man of the year, Gail seeks out Castaneda's apprentice and is catapulted into a strange world of ancient beings, aliens, native shamans, invisible teachers, and the world of metaphysics. Dr. Siler is thrust into an unknown world that takes her from the safety of her everyday life into a radiant landscape where true power lives. Introduced to an ancient couple who have lived and loved beyond time itself, Gail offers up her heart to become a co-conspirator with them in an unbelievable task. By helping the ancient couple keep the death-bed promise they made to each other eons ago Gail learns the key to humanity's own resurrection. It is this Butterfly Promise that will save the ancient couple and help return humanity to its true powers and wholeness.