Kosuira has been captured and tortured by the Tsol'teth in their Seleucar Outpost.
In bargain for her return, Tenith'oru has offered the overlaners assistane with their shadow problem. The girl was found, deranged, and was able to be lured back to Tenith'oru. The art of unwinding time in order to free the shadows that defended the shrines to the Meld was taught in payment.
To find out the full details, head on over to Events #558.