The miniseries is a 45-minute four-episode thriller. The murder of a young man who works in the exhumation of a Civil War grave opens a police investigation that will reveal past and recent crimes. The miniseries, which shoots in several places in the province of Barcelona, is directed by Agustí Vila and starring Nausicaa Bonnin, Núria Prims, Blai Llopis, Sergio Caballero, Xavi Sáez and Marcos Franz.

La fossa is a coproduction of Tv3, À Punt Media, Bausan Films and Wise Studios, with the support of the Department of Culture of the Generalitat, CulturArts and Generalitat Valenciana.