In *Kingdom Come: Deliverance 2*, the side quest "In Vino Veritas" offers a rich and engaging experience, albeit with a few intricate steps that might be confusing or frustrating. This quest is a journey within a journey, requiring patience and attention to detail to uncover the secret behind the monks' renowned wine.
Your 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 meet him. Casper is curious about the secret ingredient in the monks' wine, and your first task is to gather information. Engage in a thorough conversation with him to learn about Havel and the book he left with Adleta, which will guide your next steps.
To obtain 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 often spends her time. Before you go, pick five Marigolds. Try to reach Adleta before her brother Hugo arrives, or if he's already there, get his permission to speak with her. Be kind during your conversation, explaining that you need the book for Casper. You can either pass a skill check to persuade her or offer the Marigolds as a gift in exchange for the book. Once you have it, make sure to read it from your inventory.
Alternatively, you can bypass Adleta 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 talking to Havel, select these dialogue options: "Germany. Let's do it," "That's a very fine gift," "Steinberger," and "It's missing ginger." These choices will impress Havel, leading him to reveal the monastery's secret ingredient. Return to Casper with this crucial information.
Your next destination is the vineyard north of Kuttenberg. Start the "Under the Straw Hat" side quest by speaking to the recruiter, which allows you to explore the vineyard without being considered a trespasser. Inside, find Jerome, usually sitting on a bench near the main building.
Sneak into the main building, turn left, and head to the storeroom. Use your lockpicking skills to open the chests and find the Sulphur Wicks, which are essential 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," participate in tasks like removing plants around the vines and moving sacks. Once you've done enough work, report 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.
Completing "In Vino Veritas" in *Kingdom Come: Deliverance 2* not only advances your journey but also opens up opportunities for other quests, or perhaps you might indulge in collecting badges and dice for a change of pace.