Portrait painter, Charles Honeybath, is intrigued when he is visited by a mysterious Mr Peach and is commissioned to paint an anonymous, aristocratic sitter, known only as 'Mr X', whom relatives claim is insane. Under cover of night, Honeybath is taken to the house and asked to stay while he completes his work; but when he returns to his studio, he discovers that the bank next door has been robbed and that he is under suspicion!

When portrait painter and occasional detective, Charles Honeybath, pays a visit to his old friend Edwin Lightfoot, there are a few surprises in store. Edwin's irksome wife is packing her bags, while Edwin is indulging in an eccentric game of pretenceacting the part of a long-dead petty criminal named Flannel Foot. Days later, when Edwin disappears, Honeybath finds himself with a mystery to solve and some decisions to make about his life. Will he be lured by his intended haven?

At Mullion Castle, sumptuous stately home, we meet the Earl and his family, who include his delightful daughters, Patty and Boosie, and dotty Great-aunt Camilla. Old school chum, Charles Honeybath, who has been commissioned to paint a portrait of the Earl's wife, finds himself at the helm of a complex investigation involving ancestral works of art and a young under gardener, Swithin, who seems to possess the family features somewhat strikingly . . .

Every English mansion has a locked room, and Grinton Hall is no exception - the library has hidden doors and passages and a corpse. But when the corpse goes missing, Sir John Appleby and Charles Honeybath have an even more perplexing case on their hands - just how did it disappear when the doors and windows were securely locked? A bevy of helpful houseguests offer endless assistance, but the two detectives suspect that they are concealing vital information. Could the treasures on the library shelves be so valuable that someone would murder for them?