Trace to the Source Quest Guide

Trace to the Source is a main quest in Zenless Zone Zero (ZZZ). See how to unlock Trace to the Source, a walkthrough on how to complete this main story commission, its Hollow guide, and its rewards here!

Trace to the Source Quest Information

Trace to the Source Main Story Details

HDD Chapter	Chapter 2
Enemy Level	28
Location	Brant Street, Old Town District
Client	Koleda
Difficulty	⬤⬤⬤⬤〇〇
Rec. Attributes
Time	Anytime

Trace to the Source is a Main Story commission that is unlocked after finishing Speedy Chaser.

Trace to the Source is one of the subquests in A Call From the Hollow's Heart. To unlock this commission, Proxies will need to finish the previous quest, Speedy Chaser.

Complete this quest to unlock the next mission in the questline, Path of the Proxy II.

A Call From the Hollow's Heart Quest Guide

How to Unlock Trace to the Source

Complete Speedy Chaser

Trace to the Source is a subquest of A Call From the Hollow's Heart and can only be unlocked upon completing the previous commission in the questline, Speedy Chaser.

Complete this quest to progress through the story and unlock the next commission in the questline, Path of the Proxy II.

Speedy Chaser Quest Guide

Trace to the Source Quest Walkthrough

Trace to the Source Guide

1. Talk to Grace in Brant Street Construction Site
2. Complete the Commission Using the HDD

Talk to Koleda and Grace in Brant Street Construction Site

After finishing Speedy Chaser, follow the objectives until it tells you to the Brant Street Construction Site to meet with Koleda.

Some dialogue scenes will play out and Grace will give you the commission.

Complete the Commission Using the HDD

Go back to Random Play and use the HDD System to start the commission.

Trace to the Source Hollow Map

Trace to the Source Hollow Guide

Trace to the Source Hollow Map

Trace to the Source HDD Map Contents
Map 1	Map 2

Hollow Deep Dive System Events and Guide

Step-By-Step Guide

1. Get Observation Data 1
2. Navigate the Left Machine to the Goal
3. Get Observation Data 2
4. Navigate the Right Machine to the Goal
5. Go Help Grace
6. Get Observation Data 3 and Fight the Enemy

Get Observation Data 1

Progress through the map, destroy the first breakable wall and then obtain the first observation data.

Navigate the Left Machine to the Goal

The next section of the puzzle involves you controlling one of the heavy machines (left one) using the control sticks. Destroy the walls by passing through them with the heavy machine.

Before going to the goal however, destroy the walls on the top of the heavy duty grappler since the grappler cannot destroy walls once you control it.

Unfortunately, the heavy machine cannot pass through bombs in the area.

Get Observation Data 2

Go back down and go through the new path to get Observation Data 2. Proceed up to navigate the heavy duty grappler (the machine on the right).

Navigate the Right Machine to the Goal

Control the heavy duty grappler to get to the goal. This one can destroy bombs but cannot destroy walls so make sure that you have destroyed the walls on its way with the other machine.

Go Help Grace

Once the machines are on the goal, an enemy will attack Grace. Go to Grace's location in the map to trigger a fight.

After the fight, some dialogue will play out and Fairy will optimize the algorithm to search for the traget location. Once the target location appears, go there to go the next map.

Get Observation Data 3 and Fight the Enemy

On the second map, you can immediately see the final observation data. Go there and heal up on the safe zone if your health is low and get the other items.

Finally, go to the prototype and fight the enemies to finish the commission.

Trace to the Source Rewards

Quest Rewards

All Quest Rewards
Polychrome x60	Denny x11000	Bangboo Algorithm Module x2
Inter-Knot Credit x550	Elite Investigator's Supply Box x2	Senior Investigator's Supply Box x2

Zenless Zone Zero Related Guides

All Main Commissions

All Main Commissions

All Commissions and Types