American cop Cathy Stewart stays on in the Scottish Highlands, to defend the Macpherson family from the inquisitive D.I. Duckett over the bones of ancestor Gordon Macpherson. Simultaneously, she finds herself entangled in a more than 110-year-old scandal, involving the laird’s daughter Katherine at the University of Edinburgh. Meanwhile estranged husband David, continues his genealogy quest into the WWI atrocities of Gallipoli, where his ancestor Alexander Stewart is said to have died. Following Cathy’s trail, New Yorker Diane Cox boards the luxurious Royal Scotsman train, to heir-hunt her way to the Ballindalloch estate and confront present-day patriarch Angus Macpherson. Just as the path of David and Cathy reunite, and all threats come together, Angus disappears…