Scarlett thought Dan McAndrew's murder was long behind her, but when she and her classmates arrive in Edinburgh for a weeklong field trip, she's startled to be joined by her old St. Tabby's cohorts--and enemies--who are visiting the area on a field trip as well. Even more startling, Callum, Dan's surviving twin, is in the area--and his cold treatment leaves Scarlett wondering what's changed, especially when a series of attacks makes her believe...