Fair Maiden is one of Xanthe's Transports events. A female prisoner is being moved. Stop the convoy, free her, and tick another transport off the list for Delivery Delay.
Intercept the convoy on the road, kill the guards and their wolves, then talk to the captive to set her free.
It raises Xanthe's anger toward The Cycle of Love and counts toward the eight transports you need for Delivery Delay.