From the official GW site:
Pahbahzhen, Brother Mhenlo,

Our worst fears have been realized. A plague is spreading across Cantha the likes of which I have never seen nor even imagined. Our healers have found no way to combat this affliction, and all our attempts to learn of previous outbreaks in the imperial archives or through consultation with the spirits of the dead have proven fruitless.

Truly, Mhenlo, I have never known a monk with a greater gift for healing, and though you are young, you have traveled far and wide. I would not ask this of you for myself, for I know full well that the last few years have shown you more than enough misery and strife, yet I do ask. I ask you to come and lend us your insight.

I ask in the name of all you love and remember about Cantha. The sweeping grandeur of Shing Jea Isle. The towering spectacle of Kaineng City. The breathtaking majesty of the Jade Sea. The dark beauty of the Echovald Forest. And, of course, all of us who have been proud to call you friend these many years. Return to us, Brother Mhenlo. We need you.

Master Togo
27 Suzhen, 1582