- Talk to Mackenzie Bridgeman or Preston Garvey.
- Hunt down the heads of the hydra: Mags Black, William Black, Mason, and Nisha.
- Be warned that once one raider underboss dies, every single raider in Nuka-Town USA will become hostile dozens upon dozens of them will gang up on you, so be prepared to handle them all. This is not a quest to take on under-supplied.
- Once they're gone, return to Mackenzie to tell her that everyone is free to go.
- This quest activates a miscellaneous objective to turn on power for Nuka-World.
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