Blood Tide

Blood Tide is a quest in the Fallout 4 add-on Far Harbor.

Synopsis
Cassie Dalton wants revenge on the monstrosities that wiped out her family on the island. The Survivor will act as vehicle of that revenge.

Walkthrough

 * 1) Talk to Cassie Dalton. She'll soon hire you to fight on her behalf. You'll be assigned a series of locations to clear out, including:
 * 2) National Park Campground (ghouls)
 * 3) Dalton Farm (fog crawler; also makes the area available as a workshop settlement)
 * 4) Brooke's Head Lighthouse (trappers)
 * 5) Return to her each time. After all three are clear, mission accomplished.