Astronomer Miriam Adler uses her expertise to identify star patterns from a 14th century cuneiform scroll, only to discover they date not to the past, but to two thousand years in the future. Certain factions in Rome, however, believe humanity is not ready to accept the revelations in the document, and are prepared to destroy it, and silence any who know its contents. Thus, she’s thrown into a power struggle within the Vatican that leads to the death of one colleague and the madness of two others.
Undeterred by the danger, Miriam goes on a pilgrimage with a Jesuit companion who walks the fine line between reality and mental chaos. Their goal? To retrieve the original manuscript from the archives of Saint Catherine of Siena. After her Jesuit companion is kidnapped, she joins forces with a rogue Vatican Cardinal, his lifelong linguist companion, and her son, a Franciscan friar. Her quest takes her through Italy’s holiest shrines and the ruins of a Knights Hospitaller monastery on the Island of Rhodes. But the most dangerous path takes her along the fourth dimension of time.