Oh there's a lot of quest
1) in the forest need to the cave and enter it
2) try to the NW part of the cave (there would be some kind of waterfall
3) when you exit you will on the other side of the lake up top (u know where you go there is a lake blocking the way in the west side)
4) go to the most north part
5) at the most north part there would be a broken bridge interact with it
6) Now you have to back to the town and talk to the carpenter ( the purple wolf dude that is the entrance of the forest) need to be at daytime he goes to sleep at night
7) need to wait a day or 2 to fix the bridge
8) Repeat steps 1-5 there is a lot of back and forth
9) once the bridge is fix you can cross it to the east side of the lake and there is your flower