Simon Crathorne, who unexpectedly inherited the title of Duke of Billingham, did not know that the new position, it turns out, obliges him to marry and give his family a legitimate heir. An heir is not a bad thing. Marriage... And this can be tolerated, if the bride were good. However, Simon stubbornly wants to take only Lillian Mayhew, the daughter of his sworn enemy, as his wife. But she cherishes completely different plans - to destroy the Duke and destroy his reputation. War? Well, both opponents are ready for battle. But is Lillian as indifferent to Simon as she wants to show?