In the not-too-distant future, technology has made it possible to build and sell androids that are compliant with their owners. One of the latest models is showing flaws in its behavior. Its name is Alexa.

Vitoria, Basque Country, Spain, March 3, 1976. After several months of protests demanding decent working conditions, a general strike is called. Thousands of workers gather at the church of San Francisco while a hundred heavily armed policemen wait to act.

This documentary recounts the story of the ETA militant Lucía Urigoitia, who died in 1987 in Pasaia at the hands of the Civil Guard, in circumstances which remain unclear. Based on the account given by the Urigoitia family's lawyer and the forensic scientist involved in the case, the narrative pores over the contradictions and doubts surrounding the process. The tree stands out in the documentary as a symbol of the need for a complete memory, as opposed to the idea of one single memory.