This zone is opened as part of a quest. Aramir, the shop keeper, wanting you to kill the rats in his cellar.

Map Edit

T S C S3
Map Key
Symbol Description
T Stairs to Shop
S3 Stairs to Sewers level 3
C Chest
S Secret Passage

The chest contains a Red Tunic (Clothes, +5 Protection, +5 Fire Protection)

S3 also has a Not-A-Rat Boss along with some other Not-A-Rats.

T will contain a Not-A-Rat Boss after all of the Not-A-Rats in the 9 white squares are defeated or ran away from. You may do this to the regular Not-a-Rats but not the Boss.