Two boys, each living in a different period of English history, connect with a reality unseen by those around them. All about them is chaos, as Christianity vies with Islam for control of Jerusalem in the late 12th century, and assassinations and mayhem unfold wildly thorough 1981. Lincoln Cathedral is the setting for a thrilling story, alongside an exploration of what is real, what can be known, what is Faith, and is there really a God? This fascinating journey weaves real historical figures and events with the ideas of possibility, of angels and of saving the Western and Islamic worlds from their own violence and prejudice.