'We have some wonderful mosaics in Pompeii, but I've never seen a better one than this!' After the young Roman mosaic designer Felix starts work in Pompeii, his whole life changes. There he falls in love with the beautiful Greek slave Agathe, who can see into the future. When the volcano Vesuvius sends hot ash over the city, Felix — and Agathe's brother Alcander — ride to the port of Misenum for help. But will they reach admiral Gaius Plinius in time, and will they ever see Agathe alive again?