The Memory Den (quest)

The Memory Den is a side quest in Fallout 4.

Detailed walkthrough
This quest is obtained by entering the Memory Den in Goodneighbor, at any time before rescuing Nick Valentine. Irma tells the player the Den is not accepting new clients, but it is possible to convince her to grant a trial run, either with an easy Charisma check or an upfront payment of 100 caps.

The player character is asked to sit in a memory lounger to relive a recent memory, which is always the kidnapping of Shaun. During the recall, the player can move around the cryo pod space of Vault 111 and click on several targets, including the cryo pods, the scientists in hazmat suits, Kellogg, and the pod containing Shaun and the Sole Survivor's spouse. The player vocalizes anguish as they relive the inevitable, followed by rage and vowing to kill Kellogg after he shoots their spouse. Doctor Amari pulls them out of the memory after the events are relived.

Once the player character emerges from the lounger, Irma apologizes for putting the Sole Survivor through that trauma a second time. It is possible for the player to pass a medium Charisma check and get a refund. Regardless of how the conversation goes, Irma mentions that she knows a good detective in Diamond City that will be able to help find Shaun, who happens to be Nick.