New York heiress Louisa Thurston Reid has traded her millions for an English peerage, entering into a marriage with the dashing yet distant Marquess of Granborough. Determined to make their match a success, Louisa is undeterred by the fact that she has barely spent a moment alone with her handsome husband.

For Giles, Lord Granborough, the arrangement is purely transactional. Forced to sell his hand in marriage for an American fortune, he longs to survive the honeymoon and return to the childhood sweetheart who holds his affection. His plan seems foolproof?until he and Louisa embark on a journey across the Atlantic.

Sharing a bed and navigating the opulent yet intimate quarters of the steamship, the new couple is thrust into an unexpected proximity. Louisa's unwavering resolve and brash American charm begin to chip away at Giles's hardened exterior to reveal vulnerabilities neither expected. As they sail towards England, the boundaries between duty and desire blur, and Giles soon discovers that his stubborn heart is no match for a lady determined to make him hers.

Louisa's dream of a real marriage starts to feel within reach, yet the shadows of Giles's past threaten to pull them apart. As the ocean liner approaches England, Lord and Lady Granborough must decide if they will let go of their fears and embrace the love that has blossomed between them.