The instructions given for this quest tell you to "Go to B1F of the Golden Lair, find an Ice Stone, and deliver it to the bar!" The first part of this quest is relatively simple. Go to the first floor of the Golden Lair and wander around until you find a "check" point. It will be located in the top part of sector C3. Once you claim the Rose Ice Stone, a soldier approaches you: If you choose to return to Tharsis with the stone rather than giving it to the soldier, you can go and report the results to Kirtida.