Once more, Chimneys becomes the scene of a tragedy.
A politico financial meeting must take place in its walls, and Lord Catheram will be the host of several important characters.
Princes, Lords, Ladies, will attend this meeting which will have to decide peace in Europe.
Anthony Cade, sent by his old friend Jimmy Mac Grath, whom he randomly met during its holidays, must give documents to one of the high mark guests of Chimneys.
He manages to be invited, and sees himself already richer of a reasonable sum.
It is counting without the crime which takes place during night, and to which Cade takes share in spite of him.
It is the superintendent Battle helped by inspector Lemeunier who sees himself in charge of the case.
Which one of the guests is a hidden criminal?
Which one of them slipped into the library to steal compromising documents for the peace of Europe?
It is an investigation in any discretion the experimented police officers must carry out, indeed, the social status of the guests and even if one of them is criminal obliges them to act with tact.
An investigation which will carry them out to a criminal of a great ingeniousness, and which will allow Cade to live much more important adventure than the perspective of a huge amount of money.