In *Kingdom Come: Deliverance 2*, the side quest "In Vino Veritas" offers a delightful yet intricate journey through Kuttenberg City. This quest not only involves a series of steps but also includes a nested side quest, making it a rich experience for players. Let's dive into the detailed walkthrough to ensure you can navigate this quest with ease and enjoyment.
Speak with Casper and Havel

Screenshot by The EscapistYour adventure begins with Casper Rudolf, who you'll find by his drink cart on the east side of Kuttenberg City. Simply enter through the east gate and head straight to bump into him. Casper is curious about the secret behind the monks' wine, and your task is to uncover this mystery. Engage in a thorough conversation with him to learn about Havel and a book he left with Adleta, which will guide your next steps.
To retrieve the book from Adleta, head to the southeast corner of Kuttenberg's inner wall during the morning or afternoon. You'll find an open garden where Adleta spends her time. Before you go, pick five Marigolds. Try to meet Adleta before her brother Hugo arrives, or if Hugo is already there, get his permission to speak with her. Be kind during your conversation and mention that you need the book for Casper. You can either pass a skill check to persuade her or offer the Marigolds as a gift to secure the book. Once you have it, read it from your inventory to gain valuable insights.
Alternatively, you can skip the book and head directly to Havel at his inn in Kuttenberg City. Ensure your Charisma is at least 18 by choosing the right outfit and brushing up on your drinking skills. When speaking with Havel, select these dialogue options:
- Germany. Let’s do it.
- That’s a very fine gift.
- Steinberger.
- It’s missing ginger.
These choices will impress Havel, leading him to reveal the monastery's secret ingredient. Return to Casper with this information to progress further.
Find the Monastery’s Secret Ingredient

Screenshot by The EscapistNext, journey to the vineyard north of Kuttenberg and speak with the recruiter to initiate the "Under the Straw Hat" side quest. While completing this side quest isn't necessary, starting it allows you to explore the vineyard without being labeled a trespasser. Inside, find Jerome sitting on a bench near the main building.

Screenshot by The EscapistSneak into the main building, turn left, and head to the storeroom. Use your lockpicking skills to open the chests and retrieve the Sulphur Wicks, which are crucial for Casper. For extra Groschen, visit the garden behind the main building and collect five seedlings before leaving.
If you choose to complete "Under the Straw Hat," engage in tasks such as removing plants around the vines and moving sacks. Once you've done enough work, report back to Jerome to finish the side quest and earn some Groschen. Otherwise, return to Casper with the Sulphur Wicks and seedlings, if you've collected them.
With that, you'll have successfully completed "In Vino Veritas" in *Kingdom Come: Deliverance 2*. Now, you're free to explore other quests or indulge in collecting badges and dice for a change of pace.