The letters from no-one

"This is all the events of time that Emily does her Little routine,"Mrs.Cooper said."Oh and one last thing,never open the letter in the mailbox you've got to trust me."

"Sure.." I replied. I was too tempted to know why I couldn't open the letter...It was the only thing on my mind...

Suddenly,there was a knock on the door...

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Ebony is just a 18 year old girl involved in something she never wanted to be in..She keeps getting all these letters ever since the knock on the door 4 years ago,when babysitting her neighbours house.The police are doing everything to find out who this mystery man is..