Along with the release of the already controversial new Detective Agency in FrontierVille comes a series of five new missions that can also be completed. Just as with the Detective Agency building itself, these missions are on a slow rollout to users. While you may receive these quests within a few hours, you may also have to wait until tomorrow or later, so if you don't see them in your game, please be patient. Also keep in mind that as these missions are incredibly new, these details are subject to change at any time.
The first of these missions is called simply "Finkerton's Detective Agency," and it has you placing the new building on your Homestead.
Purchase Finkerton's Detective Agency from the Market
Clear Ten Grass on Your Homestead
Harvest 15 Apple Trees
FrontierVille Forums user Thanisa has an image showing off this first quest, which gives us a sneak preview of what the completed Detective Agency will look like, if you don't already have it on your land. Remember, if you don't have 15 Apple Trees on your land, simply harvest the ones you do have and come back to finish this step 30 minutes later. Your rewards for finishing this quest are 250 XP and 250 coins.