Letter: The Lowdown

The Lowdown is received in Act 2 you defeated enough The Undercuts at the Docks at night. It starts a quest with the same name.

Letter
Directions to the Undercuts' Base

We took a piece of the Docks and we ain't giving it up. Anyone comes to the base, Kanky wants them dead. He don't care what they're selling.

The Undercut