Revolutionary France, 1793. When Calvin Tarkington, a young Boston merchant-trader, arrives in Paris on July 4th, he finds a city in turmoil, riven by quarrels between revolutionary factions and threatened by advancing Coalition armies. Calvin's brother Alexander, the family firm's representative in France, has disappeared, suspected by a powerful Jacobin official of spying for the British. As Calvin seeks to clear his brother's name, his quest for...