Start The Depths chapter in Little Nightmares by controlling the Runaway Kid, a side character first seen in Six's story.

Help the Kid with collecting all the missing statues to confront the Lady in Little Nightmares.

To begin this quest, look for the Pompous Man, who pretty closely resembles the client for Soul in the Machine. To find him from the Seedhollow town square, run around the outer circle until you see ...