Pete and Liza Saunders live in a classic Georgian townhouse in central Bath, built in 1774 by John Wood (who also designed the famous pump rooms and the crescent in the city). Previously divided up for student accommodation, and furnished with 1970s decor, the Saunders plan to restore the house to its former glory. So far they have completely restored the drawing room with Georgian features, but a pair of shoes left behind a wall presents a mystery. The Saunders also find that one of the bedrooms has a sealed up chimney recess, complete with an old-fashioned door that looks like it has never been opened. What will they find inside?