When Scotland Yard superintendent Duncan Kincaid takes Gemma, Kit, and Toby for a holiday visit to his family in Cheshire, Gemma is soon entranced with Nantwich's pretty buildings and the historic winding canal, and young Kit is instantly smitten with his cousin Lally.

But their visit is marred by family tensions exacerbated by the unraveling of Duncan's sister Juliet's marriage. And tensions are brought to the breaking point on Christmas