Parkinson's patient George d'Clare and his wife Madison find themselves in the middle of another mystery. Dying from an age-old poison, Madison's Uncle Charlie makes an unbelievable confession: his real name is Aquinas, born in 1322, and he's been involved in a seven-hundred-year crusade to stop the Wanderer, an immortal man determined to destroy the world.
Charlie explains his amazing longevity is from ingesting the mythical element carmot, a magical substance that cures diseases, suspends aging, and transforms ordinary rocks into pure gold. He also reveals he has partially deciphered a medieval clairvoyant's "Wordless Book" (a manuscript containing only symbols) foretelling where to find the carmot, and how a weakened man will hold the secret of how to defeat the Wanderer - a man who fits George's description.
When Charlie dies, Madison attributes his bizarre story to delirium. But after narrowly escaping a fire that destroys her uncle's home, she and George make a startling discovery: an ancient book full of symbols!
Can George and Madison decipher the remaining symbols in the Wordless Book before the Wanderer orchestrates Armageddon?