Where do I find a treasure site? Will it open once I receruit Bella (the Werewolf hunter)? I tried reaching Katie at the Grassmarket after Day 20 but not sure whether I was doing it right?
The treasure sites show up in Elsewhere; they look like a treasure chest. Depending on who you bring, you get different options... Molly finds gems, Emily finds ingredients, Bella finds different things, but has the highest probability of finding Special Ingredients.
To find Bella; you can meet her and Katie at the Grassmarket at Night, after day 20. Once you've done that, you can find her any time after day 23 in the evening in Grassmarket; she'll invite you to strip poker that night, and also volunteer to go Elsewhere with you.