Into the Fold

Locate the hidden mansion entrance
Between hanging roots of vines, a climbing patch of ivy and the entrance. Going through completes the step and Wrath of the Dawn

Proceed through the tunnels to Marquard's mansion
Immediately before the door leading into the basement, "You may now resurrect at the anima well: Marquard's Mansion : Basement". Passing through the door completes the step.

Confront Philip Marquard
You can step just inside the large room, enough to look around. When you advance further, a cutscene. Immediately after the scene plays out, it can't hurt to attempt to move backward as far and fast as possible to avoid multiple area attacks.

The dog moves fast and the boy moves slowly; if they both get close enough at the same time, it can one-shot-kill.

Defeat Marquard's family
When complete, a cutscene: the one thing that can lay you low. Berihun gloats.

Escape the Prison
When complete, a cutscene: a confession of sorts from the man who brought you here.

Defeat Berihun's automaton
Berihun taunts from a safe balcony. Into the Fold completes with the death of the Patchwork Juggernaut in Marquard's mansion, and Marquard's Wake instantly commences. "Wake" does not progress until the Bee attempts to leave the mansion. Once they do, they receive a text message from Mark Strakes and the Callback mission.

= Callback = Tier 1 Step 1: "Locate Mark Strakes in New Dawn."

Sleep until morning and go to 440, 440. Mark Strakes will now sell you items and the Dead Drop mission is unlocked.

=Dead Drop= "Mark's Notes" : a blue file folder next to Mark Strakes at 440, 440. A similar blue file folder is in exactly one of 51 locations. Perhaps it is easier to find by following all the possible locations, but it might simply be easier to just search New Dawn from top to bottom without also laboriously consulting a list of notes. It is not unthinkable that the developers had this very quandary in mind when creating the mission, or at least the thought of thwarting the usual solution to such tasks, of looking online for a list of locations. A link to the list of locations : Dead Drop - TSWDB

Links

 * Callback - TSWDB