Starting in the last stages of the Spanish Civil War, the plot follows the mishaps of Rebel faction corporal Juan Castro, who finds a mule in the battlefield.

[4] The footage was shot in 2009 largely under direction of Michael Radford, with Sebastián Grousset taking over the last days of the filming.

[6][8] Gheko Films also peddled another lawsuit against Spanish Under-Secretary for Culture Mercedes Elvira del Palacio Tascón [es].

[4] After the legal battle turned in favour of Frade, ICAA handed the film its certification in December 2012.

[10] Mirito Torreiro of Fotogramas rated The Mule 3 out of 5 stars, highlighting Mario Casas as the best thing about it, while citing the film's "much improvable" writing as a negative point.