When an old man dies in strange circumstances in the home where his grandfather lives, Daniel realises that he is the only one who sees traces of an unsolved crime and not a simple unlucky accident. What was that man doing at the window in the early hours of morning? What is the meaning of the mysterious mountain of dead birds that suddenly appears in the home? Why did the old man leave no trace of his family or past life? Daniel decides not to give up and with the surprising help of his grandfather and his friend Jonatán, manages to gradually uncover the hidden plot of a dangerous murderer who commits his crimes by following a mysterious ritual... Daniel Ackroyd and The Crime Club join forces in a new adventure, an investigation that will reveal the keys to understanding just how true end-of-the-world prophecies are.