Ok i have talked to the doc goblin in the house, and he said i have to test the potion at rat's den. How can i reach it?
You need to progress the story. It's the last part of chapter 2.
Yeah, but i can't progress in the story. All i can do is going back and forward from the city to the neighbourhood and talk to Trald in the gym. Kru has said i have to fight rats, but i don't know where i can fight them