Ghost Recon Wiki
See also for Operation: Narco Road Files

The Ghost infiltrator poses as a mercenary for hire and befriends the leaders of the gangs carrying out smuggling operations. Each gang leader provides clues to El Invisible's identity before the Ghost assassinates them. Eventually, the Ghost's notoriety grows to the point where El Invisible recruits them into Santa Blanca, erasing the Ghost's identity and staging their death.

However, El Invisible is aware that the Ghost is a CIA agent and has them imprisoned. The Ghost escapes and, with the help of an informant using the alias Señor Sonrisa, recovers the handheld device El Invisible uses to run Santa Blanca's smuggling network anonymously and seemingly kills El Invisible.

When the device is decrypted, it unleashes a virus that compromises the CIA. The Ghost deduces that Sonrisa is El Invisible, and that he orchestrated the operation to escape Santa Blanca, attack the CIA and disappear for good. Unable to explain Sonrisa's motive for attacking them, the CIA spend the next two years tracking him.

He is eventually found in Arizona, and the Ghost is assigned a mission to kill him.