A young woman reaches Cambridge in search of a distant relative whom she believes has lived longer than any other human being.An astronomer discovers a strange, point-like source of cosmic rays coming from the constellation of the Unicorn.A retiring professor discovers documents from Puritan times about a series of strange deaths and disappearances in the early Boston settlement. One of the signed witnesses has the exact same name as a celebrated minister whom the old professor has welcomed on campus.Three sleuths and three threads...all leading to the same man."I long to believe in immortality," wrote John Keats over 150 years ago. There are those who knew while the poet lived, and those who know better now that some things are better not wished for. The Reverend Doctor Janeway knows why. And his secret is one of the most dangerous ever uncovered.