Walkthrough

The Incident at White Orchard/Lilac and Gooseberries Part 2.

After completing the contract on the Griffin. Go to the bar and talk to Vesemir about leaving White Orchard. During the conversation with Vesemir he notices that tensions are rising in the bar.

Soon after Geralt and Vesemir will get attacked by the people at the bar. As soon as the cutscene ends come out swigging as the people aren't very strong and have weak defense. Once you've dispatched the men, watch another cutscene that will lead you to the end of the mission.