Lovejoy takes an antique gun to a London gunsmith to be repaired, but the armorer is having landlord problems. Meanwhile, an acquaintance of Lovejoy's, Texas Greenberg, is on his way over to buy something special.
Tinker disappears, and Lovejoy sets off to find him. He arrives in Devon, where he discovers that Tinker's real name is Archie and that he has a sister whose hotel business is threatened by a rogue property developer. Charlotte and Beth join them and they look for ways to raise money to save the hotel.
Meanwhile, Tinker has lost the key of Charlotte's safe-deposit box.