Last wish on earth

"I didnt mean to kill her, I really didnt!"

Willow woke up, not knowing what happend yesterday besides one sentence she exchanged with someone- not knowing who, when or why- nothing. Did she got into a fight with her dad again? As she looked around the house, searching for her family she finds out, that everyone dissapeared- but not only her family is gone.
Everyone seems to be gone. But where did they go? Does it have something to do with her wish she made yesterday?
What will she do now? What will happen as she searches for people that didnt dissapear yet? Will she find any or is she going to be alone until she dies- until her wish is completely fulfilled?