Johan Falk and his colleagues at the GSI go after sex traffickers importing young women from the East and forcing them into prostitution. Johan Falk and his colleagues at the GSI go after sex traffickers importing young women from the East and forcing them into prostitution. Johan Falk and his colleagues at the GSI go after sex traffickers importing young women from the East and forcing them into prostitution. Johan Falk and his colleagues at the GSI go after sex traffickers importing young women from the East and forcing them into prostitution.