Police procedural: some detail pertaining to a murder case is nagging at the back of a detective's mind "like having a stone in his shoe." Once he teases it to the surface, he solves the case.

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Main Cast: Andrés Soler, Fernando Fernández, Ariadna Welter, Roberto Cañedo, Wolf Ruvinskis, Rafael Baledón, Ana Eugenia Martínez, Guillermo Cramer

Director: Rafael Baledón

Writers: Rafael Baledón, Ramón Obón

Editor: Juan José Marino

Cinematographer:

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