Irish aristocrat Lord Edmund Neville Fitzgerald wears a mask to cover a scar that mars his visage. However, at night he wears a mask, stealing money from his peers and giving it back to the poor like a Robin Hood hero. The local aristocracy loathes Gentleman Niall. In a card game with Lord Wentworth, Neville wins the Kilmara estate, but must marry his opponent's daughter Elizabeth, to whom the land is entailed, to gain the land.
Lady Elizabeth travels from her home in Ireland to meet her new betrothed Neville in Ireland. Nasty highwaymen attack her coach, but Gentleman Niall rescues her from the vile thugs. Elizabeth finds herself attracted to her savior, but knows she must marry her intended Lord Neville. When she meets her fiancÃ©, Elizabeth realizes he is Gentleman Niall, who does not trust his new spouse as his enemies have hired a bounty hunter who believes Elizabeth can identify Gentleman Niall. To his chagrin, Neville wants his wife who loves him with all her heart.