Lovejoy discovers that an unscrupulous antique dealer has swindled nearly two million pounds from an American widow and a rich Japanese businessman. He plans to retrieve their money with an elaborate 'sting'.

A mysterious Brazilian banker gets involved in a plot over a priceless Inca ring. Lovejoy is introduced to Lady Jane's old school friend.

An artist is out for revenge when Lovejoy apparently mistakes some fake watercolours for the real thing.