To start this quest, talk to Gremla, who is crying outside her hut because someone stole the banner she was preparing at Brencis's request. Whether you complete this quest and how you complete it will determine if Gremla survives the evening Mass.
Time Segments: 1
Someone stole the banner Gremla was weaving on Brencis's request. The knyaz will be furious when he finds out...

1. Investigate Gremla's shed and its surroundings using Focus Mode
The banner was stolen from Gremla's shed. I need to check it for clues.
Examine the footprints and the cane tracks you find next to Gremla's hut.

Also examine the piece of banner lying on the ground a bit further away.

On one side, you will find traces of blood, likely belonging to the thief.

2. Search for villagers with walking canes using Focus Mode (1 Time Segment)
The banner was stolen by someone who used a walking cane and hurt their hand. There can't be too many people who match the description around Laslea.
You can find one of the suspects right next to Gremla. This is Alois, who uses a walking stick. Talk to him and ask him to show his hands. It isn't him, but he will give you a tip regarding the next suspect.

3. Speak with Otokar
Otokar might know something about the missing banner. I should speak with him.
You will find Otokar near his home, located in the southern part of the settlement. He has an injured hand, but he does not use a cane - so it is not him either.

4. Speak with Dana
Dana might know something about the missing banner. I should speak with her.
The next person you should talk to is Dana. You can find her west of your house. Based on the information she gives you, Premysl is likely the thief.

5. Speak with Premysl
Premysl might know something about the missing banner. I should speak with him.
Talk to Premysl and ask him about his wound and stick - then you'll be able to accuse him of theft. Continue the conversation to receive three choices:
- Angering Brencis will put my family at risk. - This option will allow you to convince Premysl to return the banner. Reward: 250XP
- Maybe you're right... - Premysl will reward you with 500XP and a Daylight Amulet (Superior Amulet - +6% Maximum Human Health). You can still tell Gremla that he is the thief and receive a reward from her.
- You haven't convinced me. - In this case, you will receive 250XP.

6. (Optional) Report back to Gremla
I convinced Premysl to return the banner. Time to talk to Gremla.
If you managed to convince Premysl to return the banner, go back to Gremla and speak with her to receive 325XP and 25 Denarius.

7. (Optional) Report Premysl to Gremla or keep his secret
I found out that Premysl stole the banner in order to spite the vrakhiri. Now I need to decide what to do about him...
This option will appear if you didn't convince Premysl to return the banner. Return to Gremla and speak with her. You can tell her that Premysl stole the banner to receive 325 XP and 25 Denarius, or lie that you couldn't determine who the thief was to get 75 XP.

8. Ending
Turns out Premysl was behind it all - he stole the banner to spite the vrakhiri. He had noble intents, no doubt... But was he right to act on them?