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.
| Actor | Role |
|---|---|
 Andrés SolerCapitán Cuellar | Capitán Cuellar |
 Fernando FernándezJorge | Jorge |
 Ariadna WelterMaría Luisa Zúñiga | María Luisa Zúñiga |
 Roberto CañedoAarón Zúñiga | Aarón Zúñiga |
 Wolf RuvinskisVillardel | Villardel |
 Rafael BaledónInquilino | Inquilino |
| AAna Eugenia MartínezNiña | Niña |
 Guillermo CramerAgente policía | Agente policía |