Four episodes strictly connected to an infernal object: a bizarre pyramid that came into our world to spread madness, death and destruction.

Caterina is a girl victim of amnesia, who finds herself in an unknown village without being able to remember how she got there. In reality he doesn't even have any memory of his own identity, so he accepts the collaboration of Tommaso Carta - a local writer - to try to unravel the mystery. At the same time, the two will also be involved in a strange murder case, perhaps connected to Caterina's memory loss.