A nondescript courier arrives, wearing plain brown robes with her face hidden in the deep cowl of her cloak. He or she silently hands you an ornate scroll case in a gloved hand before leaving without so much as a rustle or whisper.
There is no wax seal on either the case or the scroll, and the parchment bursts into flames when opened, all of the carefully written letters scatter like shattered glass. A short note remains in the blackened page, etched in silvery letters like a watermark.
This message is compromised, see me at your earliest convenience. - Min