Shattered

Shattered is a main quest in Fallout 4.

Detailed walkthrough
Wander through the ethereal strands of Kellogg's memory. You can watch the scene, interact with the figures in the memory, or find the continuation of the string path and skip the memory. The last memory (involving a child and an Institute Courser) seems most interesting.

Ready to leave? Then access the television in this memory. Back in the Memory Den, speak to Doctor Amari about an old Institute scientist to visit. Then depart the Memory Den, optionally talking to Nick on the way out for a different kind of conversation.