This side quest is given to the party by the girl Petrine standing outside her uncle's house in southwest Baldur's Gate North. After getting the quest from Petrine, enter the house behind her. In the first room is her uncle, Bheren. You can choose to talk to him or simply walk upstairs. Downstairs there is a locked wardrobe containing 11 gp, a table with Oil of Speed, and a matching table containing 10 Bullet +1, none of which Bheren seems to mind you taking. Bheren won't talk unless you talk to him. He will then complain about the cat.