Cornwall, England 1818. A diversion is what Julia Twethewey needs to mend her broken heart, so when her aunt invites her to Lanwyn Manor to be a companion to her pregnant cousin, Julia eagerly accepts. Lanwyn Manor is at the heart of Cornwall's mining industry, and as a guest there Julia is instantly swept into its world of balls and parties. Despite her initial enchantment with her new surroundings, she soon realizes something dark lurks in Lanwyn Manor's ancient halls. As a respected tin mine owner's youngest son, Isaac Blake knows his place in his family, their business, and the community. He's determined to keep his late father's legacy alive and make their family business profitable, but his brother's clandestine dealings are driving them to bankruptcy. To save their livelihood, they plan to ask the master of Lanwyn Manor to invest in their expansion plans. Isaac can't deny his attraction to his host's charming niece, but his brother has made his intentions to court her clear.