Christian Arzu was a child, when he became part of Mara 18. Killing was his mission. Jose Antonio Flores was thrown off his track by drugs and alcohol. He became a feared gang lord. Rosny Castellanos was a high school student. False friends and an affinity for guns brought him to prison for 22 years. Julio Bolton grew up on the street. The Mara 18 became his surrogate family. As a teenager he witnessed a cruel massacre in prison. All four of them are today prisoners of the penal institution of La Ceiba, in Honduras, called El Porvenir. There the Swiss Coni Lustenberger works as a volunteer.