Basque Country, Spain, 1843. A police constable arrives at a small village in Álava to investigate a mysterious blacksmith who lives alone deep in the woods.

After interning her insane husband in a remote psychiatric hospital, book editor Helga Pato returns home by train, where she meets a mysterious man who identifies himself as a psychiatrist.

If the right place and time are chosen, a bag full of Marmitaco can become a terrorist threat.