Lovejoy buys a collection of Islamic antiques from retired diplomat Harold Plumb,who warns him that by rights some of the collection should have gone to the Foreign Office. He obtains his purchasing money from loan shark John Hill,putting up his daughter's flat as collateral,only to find the police on his trail and a visit to the Foreign Office disclosing the fact that Plumb is a con-man who stole the articles in question. Helped by Charlotte Lovejoy stages an extremely elaborate charade to get the deeds for the flat back from Hill.
Lovejoy buys a tatty kitchen cabinet for a song,knowing that,after restoration,it is a valuable antique dresser but the owners con Beth into parting with it. After her mother hypnotizes her Beth recalls who took it and the trail leads to shady dealer Oliver Jeffries. By coincidence Charlotte,who is minding a friend's baby,is accidentally locked in Jeffries' shop overnight. Lovejoy regains his property but is not pleased to receive a visit from the tax man.