The seductive beauty Lydia Slaughter, who finds herself in desperate circumstances, is forced to use... no, not her feminine charms, but a sharp mind, excellent memory and ability to understand numbers. She decides to enter into an alliance with the hero of the Napoleonic wars, Will Blackshear, and together they will become a real threat to the gambling clubs of London and will gain a fortune. Nothing personal, purely a business relationship - this is what Lydia tries to convince both Blackshear and herself again and again. However, she understands more and more clearly that she has made a fatal mistake, confusing work with love. And it seems that common sense is about to give way to a heart blazing with the fire of burning passion...