the end of the Great War the political map in Europe alters a great deal. A wave of change swipes across Britain; the Labour is growing from strength to strength and the economy is bleak.It is five years after Germans torpedoed the Lusitania in the Atlantic. Among the dead passengers was a British agent, who had brought with him a draft of treaty from the US. Such document would have been beneficial to Britain at the war time. Now it will easily be used to topple the incumbent government.As a result, the hunt for the document continues. For both opposing sides have realised that before the agent died, he had handed it over to a young American woman, Jane Finn, who was rescued and arrived safely in England.Apparently her memory has been affected by the shock: she cannot remember anything before 7th May 1915, the day the Lusitania sinking. Consequently, nobody can retrace the document until she recovers.Tommy Beresford and Prudence Crowley - the making of the duo detectivesIn the meantime, a mere chance of having heard scraps of conversations on the street leads the young Tommy Beresford and Tuppence Crowley to be involved in the 'Jane Finn Affair'. When they accept the assignment from Mr. Carter to get the document, little do they know of what their enemies are capable. Despite Mr. Carter's warning on their ruthlessness, the pair are determined to carry out their plan. Time is essential, for Tommy and Tuppence just have a fortnight: they have to hand it in to Mr. Carter before the Labour Strike on 29th.