Concierge

Concierge is a Railroad radiant quest $$

Detailed walkthrough
After establishing a new safehouse for the Railroad, the Caretaker will request that the Sole Survivor clear a random location of its hostiles so that a synth, whose designation starts with K8, will be able to leave the Commonwealth safely. Once all enemies in the location have been killed, return to the Caretaker to complete the quest.

Bugs

 * If the area assigned has already been cleared out, then the player character may have difficulty with quest completion.
 * To counter this bug on PC use console and insert: . This will mark the 'eliminate target' as completed and will let the player character talk to the Caretaker (be safe and check it with ).
 * The marked enemy may not appear if the location is visited after purchasing the Automatron add-on.