After reaching this mid-chapter quest, you’ll be exploring mysterious doors, talking to suspicious characters, and tracking clues throughout the Hypnos’ House. Here’s everything you need to progress the "Secret Behind the Door" quest and discover the lore tucked away within Duet Night Abyss’s main storyline.
Secret Behind the Door: Step-by-step guide
Follow these steps to successfully complete the Secret Behind the Door quest:
Step 1
Meet with the Outsider to initiate the quest and begin your investigation inside their house.
Step 2
Leave the Outsider’s House and have an initial conversation to set your objectives.
Step 3
Return to Sanctuary. Once you're near the Sanctuary the quest will update and tell you to head to the Hypnos’ House—this marks the true start of your secret hunt.
Step 4
Enter the Hypnos' House.
Step 5
Proceed upstairs to find and converse with Psyche, who will provide vital clues for your next task.
Step 6
Investigate the Hypnos’ House thoroughly. Interact with highlighted objects and talk to various other lodgers to pick up hidden details and deepen your understanding of the internal web of secrets.
Step 7
Wait in the lobby for Henrik to appear and initiate the cut-scene.
Step 8
Deliver your findings and intel to the Outsider, which will conclude your current investigation.
The Secret Behind the Door quest in Duet Night Abyss: Rewards
| Reward | Quantity |
|---|---|
| Secret Letter Clue | 1 |
| Coin | 4,000 |
| Combat Melody II | 3 |
Tips for completing this quest
Interact with everything
Interact with every highlighted or suspicious object; some may only be clickable after certain dialogue events.
NPCs
Don’t ignore conversations with minor NPCs—they can trigger new clues or move the story forward.
Keep an eye on your quest log
Make a habit of checking your quest log if unsure what to do next; it updates with every major progression point.
By following these steps and paying close attention to environmental cues and character dialogue, you’ll unravel all the mysteries of the "Secret Behind the Door" quest. Take your time exploring, as Duet Night Abyss rewards thorough investigation and curiosity with lore and valuable items throughout this mission.
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