Isabel accepts an invitation to serve on the advisory committee of the Scottish National Portrait Gallery, but soon finds herself swept up in an all-too-familiar dilemma. David is the grandson of a Scottish clan chief and is supportive of Scottish nationalism. But his fervent beliefs are threatening family harmony, especially because his sister Catriona's socialist views put her at odds with her brother. When their mother, Laura, a fellow committee member, asks Isabel to intervene, she tries to demur. But always one for courteous resolutions to philosophical disagreements, Isabel can't help but intercede.