When American homicide detective, Cathy Macpherson, reluctantly agrees to join her husband on a genealogy trip to Scotland, she does not expect to solve a mystery set in motion by her own ancestors. Switching back and forth between Victorian times and 2011, Bloodlines - Touch Not the Cat, reveals what forced Alexander Stewart to emigrate to America in 1895 and what moved laird Gordon Macpherson to protect his Highland values. Women's suffrage, racism and social division are at the heart of this gripping mystery. All bloodlines and events come together at a clan gathering in Scotland, where a family skeleton has a story to tell.