This quest can be acquired from Miller Simon, who can be found at the mill north east of Rattay. He requests that you go to the Sasau tailor shop and steal a valuable brocade. The shop is heavily guarded during the day, so you will have to wait until nightfall before you attempt to infiltrate it.
You should begin by removing any items with high noise ratings. You can then pick the lock on the front door and immediately turn right into the workshop. The fine brocade is located on a shelf behind the desk.
Take the brocade, leave the tailor shop and wait somewhere safe until the morning. You can then go back to Simon with the brocade.
The next phase of the quest requires you to go to Uzhitz in order to steal the recipe for a particularly delicious beer. The brewer is the innkeeper of the tavern in Uzhitz, who refuses to reveal the recipe to anyone, but he has it written down on a note. The room with the note in is immediately to your left as you enter the tavern from the main entrance.
It is best to enter at night, as the innkeeper will almost always notice when you open the door. You will find the innkeeper sleeping on the floor in the room, so it is best to knock him out to ensure that he does not wake as you search for the note.
Once you have the recipe, return to Simon and give it to him.
The final phase of the quest involves stealing some spurs from the Sasau cobbler. Once again, it is best to go by night to avoid a high risk of being caught. The spurs can be found in a chest in the room on the left as you enter the shop from the main entrance.
Once you have the spurs, return to Simon in the morning to complete the quest.