To conduct the final part of the negotiations and agree on the terms of a peace treaty between the Loire of the Blue Griffin and Saint-Marco, the Alcor embassy, led by Lord Contarren Berengar, arrives in the capital of the kingdom. At the same time, there is a murder of a certain lady who declared her love affair with the Marquis Delvin-Eledir, who was entrusted with negotiating on behalf of Saint-Marco. Suspicion falls on the Marquis; there are even witnesses who saw him enter her house on that fateful evening. While investigating this crime, Marc de Segur realizes that the evidence against his friend was deliberately fabricated. Who really killed the woman? Where did her servants go? And why did Contarren Berengar lock himself in his city castle and don’t want to talk to anyone? Unraveling a tangle of strange secrets and brutal murders, Mark is increasingly convinced that the breakdown of peace negotiations is only a means for the criminals to achieve another goal, which poses a danger both for Saint-Marco and for the Blue Griffin Loire.