Mary Berry explores Highclere Castle and learns what it takes to keep the castle running. In the estate's kitchen, she prepares delicious raspberry tartlets and a gamekeeper's stew.

Mary is asked to help Lady Mansfield prepare for dinner at Scone Palace. She also tries her hand at fishing on the Tay, and stalking deer in the Highlands, before making venison and cranachan.

Mary takes a trip to Powderham Castle in Devon to have time with the Earl and Countess of Devon. While admiring the historic kitchen, she bakes a Devon cream tea and a peach posset for a midsummer eve woodland party.

Mary heads to Goodwood House, where she meets members of the March family. She whips up a race day breakfast in the butler's pantry, and learns about the estate's organic farm.