Close to Home

Close to Home is the final part of the main quest and achievement/trophy in the Fallout 4 add-on Far Harbor.

Detailed walkthrough
The Sole Survivor will talk to Kasumi Nakano in Acadia and convince her to stay or go back home. When talking with Mr. Nakano, the Sole Survivor will be rewarded, unless the player character refuses to take it, or if Acadia was destroyed (including Kasumi).