Although Elsa knows that Roderick, the lord's heir, is pursuing her only for her generous breasts, she can't help but respond to his bright eyes and broad shoulders. But it's not only her heart that's affected: the women of her family begin producing milk as soon as they become intimate with a man.
Elsa can guard against physical intimacy, but Roderick's very presence stimulates her inherited trait. Worse, she finds herself falling in love with the young lord, a man far above her station. As her master, he can use her ability to lactate for whatever purpose he chooses – unless she can somehow keep her ability secret.
Although her sister has become the wife of the lord's heir, Freda is merely a dairymaid. Content with her lowborn status, she ignores the scorn of Sheridan, the lord's second son – until he directs it at her sister.
Her fiery defense intrigues Sheridan, who pursues her despite her rebuffs. Freda knows no good can come of his interest, and she refuses to admit her growing attraction to him. Undeterred, the young lord will go to any means to have her, including abduction.