May 1809. Napoleon’s Grande Armée has taken Vienna and is preparing to cross the Danube, but the Austrians are waiting for him in Essling. The carnage can begin … Louis-François Lejeune, young colonel attached to the emperor’s staff, meets his old friend Henri Beyne in occupied Vienna. He also meets the beautiful Anna Krauss, with whom he is madly in love with. Nearby, though, Napoleon is attempting to crush the Austrian army, and organising the crossing of the Danube for his troops on a single pontoon bridge hurriedly erected near Essling. Louis-François is forced to abandon his love and return to the front – and the coming firestorm …

The battle has been joined. On this first day, Massena desperately holds onto Aspern, the French cavalry charges again and again, but the Emperor cannot seem to break the Austrians. Louis-Francois, stuck on the wrong side of the only available bridge, impatiently waits for repairs to conclude. Not only are his official messages delayed, but he’s also dying to send news to Miss Krauss in Vienna. However, his friend Stendhal, who’s remained with the beautiful Austrian lady, makes some upsetting discoveries …

Napoleon is furious. It appears the battle can no longer be won. The French cavalry is so exhausted it can’t even gallop when charging. Ammunition is running out, while losses mount horrifically – both in men and in irreplaceable officers … But the Austrians have paid an equally steep price, and a complete defeat may yet be avoided. Louis- François, Paradis, Fayolle … Who will survive the terrible bloodbath – the better to serve again in the next one?