A metaphor about recent stories, fears and oblivion. An underground train carrying over 30 passengers disappears from Buenos Aires’ underground circuit. A search is organized to explain the disappearance. A young topologist heads the search, using maps and technical data. With the unexpected aid of a young girl he discovers some clues to the whereabouts of the old scientist who designed the intricate underground circuit. The search seems pointless, until a series of fortuitous events that almost cost him his life, place him inside a high-speed train, where a final revelation awaits.