Hi,

So I read this story many year's back on SPN fan Fiction. It was about some monster/demon/spirit that attacks in sevens ( or nines) , like after initial attack on a person it will attack either in seven seconds, or miniutes , or 7 hours or 7 days , or 7 weeks or 7 years . It had attacked dean once when he was with John and diappeared. It comes after him in seven years when he is with Sam. There was an OC too whose father called her sweet pi or something.

Can any one recall the story or has link to it ?