The film depicts a robbery on the bus line connecting the airport with cities in Barcelona's vicinity. The culprit is killed, and one person has an arrest warrant. Six witnesses can't identify the fugitive. Officer Fran Garza (Pablo Molinero) and his professional partner Rebeca Quirós (Ana Polvorosa) suspect that the witnesses are not telling the truth: they all claim not to have seen the killer's face, but everything points to them having made a pact of silence to protect the person on the run. Soon enough, the case goes viral, and public opinion swings in support of the criminal. The hashtag #YouWouldDoTheSame is trending worldwide.