Carlota Pérez

Marisa, a 38 years old woman, tells a stranges story to her daughter while they're walking through a level crossing in Madrid. An anthropologist, Jaime, is chased by a mysterious jeep. In the course of the chase, he takes shelter in a small motel. When he settles down, he keeps writing in his personal diary, reflecting his impressions about his work in it.

As it had happened before, a body appears on the first night of the Carnival. The locals are sure this the work of "Urco", and that more murders will follow until the festival is over.