Student Kate from Manhattan goes on an excursion to an abandoned medieval church. The girl has the feeling that she has already been here before, although this cannot be... And in 1604, Kit was brought up and studied at the monastery. One day, Simon, a boy from a family of clairvoyant gypsies, who hears the voices of angels, but is completely unsuited to life among people, ends up in the same monastery. Keith takes Simon under his wing. The destinies of Kate in the present and Keith and Simon in the past are linked thanks to the magical power of the Angel Stone. One of the three must make a terrible sacrifice. And how will this sacrifice affect their future and past? The fascinating intricacies of history, the mystery of time travel, the amazing fate of a girl living in two eras at once.