Con, son of Aemilius, a centurion, and his friend Julius, son of Septimius, a merchant, find their lives inextricably entwined with that of the young stranger and his elderly companion. These are dangerous times for those who challenge the persecution of the Roman authorities against Christians, as the two boys learn to their cost. They are given unexpected help by a legionary, Aaron the Hebrew, as this exciting tale of courage and friendship reaches its climax at Isca, the base camp of the Roman legion.
It is A. D. 311 in West Britain and even in this far-flung province of the Roman Empire Christians are not safe from renewed imperial persecution. At Caer Taff modern-day Cardiff a brief skirmish against a marauding tribe, the Deisi, develops into a more dangerous struggle between the new religion and the dominant pagan culture of the local Roman fort. Two friends, Julius and Con, meet and befriend Brychan, a young Christian priest, who is later captured and imprisoned at the base camp of the legion. Torn between obedience to parental orders and the demands of friendship, the boys resolve to help him escape. Aided by Aaron the Hebrew, a Roman soldier who has secretly converted to Christianity after witnessing the martyrdom of St. Alban seven years earlier, they set out to rescue Brychan but with unexpectedly grave consequences. This thoughtful story highlights the boys' courage, which will impact on all the characters involved. It also plays its part in bringing about the "spring tide