An armed robbery occurs inside a bus with a route connecting the Barcelona airport with some cities near Barcelona. The outcome? Three robbers have been killed, an arrest warrant issued for the murderer, and six witnesses who seem unable to identify the fugitive.

Police officer Fran Garza (Pablo Molinero) and his coworker (and ex-partner) Rebeca Quirós (Ana Polvorosa) suspect that the witnesses are not telling the truth. All of them swear that they didn’t see the killer’s face, but the investigation suggests that the witnesses may have entered a “silence pact” to protect the fugitive. The case soon goes viral with the general public immediately rallying behind the fugitive support with the hashtag: #YouWouldDoItToo.