subtitles by dramafever &amp;lt;i&amp;gt;the nss is a secret national security service.&amp;lt;/i&amp;gt; &amp;lt;i&amp;gt;before president jo myung ho was elected, its true identity was kept in complete secret.&amp;lt;/i&amp;gt; &amp;lt;i&amp;gt;all the nss agents have signed the agreement to carry out their mission in the shadows.&amp;lt;/i&amp;gt; &amp;lt;i&amp;gt;although they may succeed in their mission, their country will never know their names.&amp;lt;/i&amp;gt; &amp;lt;i&amp;gt;should they fail, they won't receive protection or recognition from the country.&amp;lt;/i&amp;gt; &amp;lt;i&amp;gt;irls.