José Manuel Poga and Julián Villagrán star in this series created by investigative journalist Carles Porta for Atresplayer. The series films in Barcelona and other locations in Catalonia. The actors will play Prieto and Calatrava, two prisoners who escaped from Ponent prison in Lleida. Nausica Bonnin and Pau Durà will play officers Clara Moyano and Pau García, who are leading the investigation.

After this escape, they will become the main target of the Mossos d'Esquadra (Catalan police) in a search that will last 33 long days, spread over six episodes. Atresmedia produces the series with Luminol Media, Goroka, and Lastor Media. The cast includes Blanca Parés, Marc Rius, Xavi Sáez, Alba Bujol, and Joan Solé. Javier Olivares and Jordi Calafí are the scriptwriters of 33 días, and Anaïs Pareto Onghena directs.