Israel Ticas is the only criminologist working in one of Latin America’s most dangerous countries: El Salvador. He’s made it his mission to find the hundreds of missing teenagers who have fallen victim to the country’s brutal gang conflict. The mothers of the disappeared affectionately call him The Engineer. But for The Engineer, death no longer evokes fear. Death is his every day, it has become his art. He calls the bodies he finds “friends” and his office walls are a macabre tribute to them all. Through the eyes of The Engineer this film offers a unique insight into the fight against gang murders in El Salvador.