1. Episode Composition
-A monster-related incident unfolds in each of the eight provinces of Joseon. Play various episodes reconstructed based on local folklore and uncover the truth behind the incidents.
- Each episode supports 3 to 4 multiple endings.

2. Investigation
- Investigate the scene of the incident and collect clues necessary to solve the case.
- Talk to NPC characters to obtain testimonies.
- Use the clues and testimonies to make deductions.
- Combine the deductions to reach a conclusion of the case. There is only one truth among many conclusions.

3. Confrontation
- If you correctly identify the culprit or the monster behind the incident, you will engage in a one-on-one logical battle.
- Expose the lies of the villain and attack by presenting clues.

4. Character Chemistry
- The player embarks on a journey with colleague Jo Gun-Gwan from the perspective of Jeong Do-sa.
- Experience the story of Jeong Do-sa and Jo Gun-Gwan growing together as they encounter various incidents.
- If you need hints during gameplay, you can consult Jo Gun-Gwan at any time.