The novel by the American writer is based on the dramatic story of the beloved and muse of the great Raphael - Margherita Luga, known to the world as Fornarina. In 2002, while studying the portrait of Fornarina by Raphael, scientists discovered that the original hand of the beautiful “Bakerwoman,” the artist’s lover and muse , was decorated with a ring with a ruby. Later it was hidden under a layer of paint. Who did it and why, history is silent. However, the writer’s imagination is able to complete what time has hidden from us... The Eternal City in Mourning. The great Raphael Santi died in the prime of his glory and is laid to rest in the Pantheon. And the one who gave him love and inspiration is looking for shelter in a monastery where repentant sinners are accepted. Until recently, Margherita Luti, the daughter of a baker from the poor quarter of Trastevere, inspired the envy of noble ladies. Now she must pay for asylum with the only thing she has left - a ruby wedding ring.