The Secret of Cabot House

The Secret of Cabot House is a quest in Fallout 4.

Quick walkthrough

 * 1) Complete missions Special Delivery and Emogene Takes a Lover, before this mission becomes available.
 * 2) Talk to Jack at Cabot House.
 * 3) Meet Jack outside of Parsons State Insane Asylum.
 * 4) Help Jack reach his office.
 * 5) Help Jack reach the basement.
 * 6) Stop the raiders from freeing Lorenzo Cabot.
 * 7) Kill or free Lorenzo Cabot.


 * Plan A: Killing Lorenzo
 * 1) Talk to Jack Cabot
 * 2) Wait 7-8 days, quest will automatically popup
 * 3) Talk to Jack Cabot


 * Plan B: Setting Lorenzo free
 * 1) Talk to Lorenzo Cabot
 * 2) Return to Cabot house
 * 3) Talk to Jack Cabot
 * 4) Criticize Jack Cabot
 * 5) Kill the Cabots
 * 6) Talk to Lorenzo Cabot

Detailed walkthrough
When returning to the Cabot house after saving Jack's sister, the player character will get this mission assigned by Jack to help prevent raiders from freeing Lorenzo. Although one can actually fail in preventing the raiders from freeing Lorenzo, the Sole Survivor still has to kill them all once Lorenzo is released.