I can explain if it helps?
1. First of all you have to ask the villager to move in, from a different town.
2. Then you time travel to the day the plot will show up with the rope around.
3. DO NOT open your game with any pre existing characters that day, you have to create a new one.
4. Once you have done that, you should be in your town with a new character.
5. Run around and see where the plot is.
6. If you don't like where it is, press the power button, then the home button, (basically rage quit without saving)
7. If you did step 6 then repeat steps 3-6 over and over till you like it.
If you do like it then do all of the things you need to do to be able to save, then save and quit, delete the character and open your mayors account for the day.