In this section of the guide to Mr Prepper you will learn how to find the herbalist in the forest during your first mission.
In the first story mission you need to find a herbalist named Jenny in the woods after you received a letter from her. Enter the forest and proceed to the next levels, the third one included. You will see a silhouette in one of the bushes when you hover the cursor over it, and in front of the bush, you will find a lever. Remember that the layout of the forest (and mine) levels is randomly generated when you first start the game, so you can not pinpoint the herbalist's exact location.