A couple of authors return to the house where they tragically lost their son. They intend to pick up some objects and then go their separate ways. Everything changes when they find a message left by the boy, who proposes a game of clues with unexpected consequences.

In a stagecoach stop far away in the Wild West the unexpected arrival of a man called "Colonel" will change all of the passengers' peaceful lives. He begins a macabre game, solely asking for one thing - to abide by his law and wait. But the night is long and the vultures perceive the smell of death that the stagecoach stop emits.

Lisa, after witnessing a cataclysmic event on Platform 7 of a railway station, finds her own fragmented memory jogged to reveal a connection between her own life and that of the event she has just witnessed.

Marcelino Sanz de Sautuola y de la Pedrueca, in 1868, accidentally discovered Paleolithic paintings with the help of a hunter named Modesto Cubillas inside Altamira's caves, located in Cantabria, north to Spain. Trying to expose their discovery to the academic world for that they study the paintings, Sautuola crashed against the skepticism and discredit of all experts, who claimed that the caves were false and the paintings made for the own Sautuola, in a effort to get rich. Looking for the truth, Sautuola was the rest of his life fighting to prove that those paintings were real, trying to restore his innocence from the accusations of falsehood launched against him.