Tuscany, 1358: Thomas Blackstone has built a formidable reputation in exile, fighting as a mercenary amid the ceaseless warring of Italy's City States. But when a dying man delivers a message recalling him to England, it seems to be a trap. Yet Blackstone cannot disobey and will brave the terrors of the High Alps in winter, face the Black Prince in tournament and submit to trial by combat. Every step of the way, he is shadowed by a notorious assassin with orders to despatch him to hell…