Shot-proof, fever-proof and a veteran campaigner at the age of twenty-five, Brigade-Major Harry Smith is reputed to be the luckiest man in Lord Wellington's army. But at the siege of Badajos, Harry meets the defenceless Juana, and a fiery passion consumes him. Harry's friends warn him that this romance with the wilful young woman could be the ruin of his career.
Under the banner of honour and with the self-same ardour he so frequently displays in battle, he dives headlong into marriage. But will their love survive relentless hardships of life on the battlefield?