Three delinquents run into an old house to hide from the wrongdoing they committed in the middle of the night. The house was once a general good store long ago where people could leave letters in the mailbox to seek advice from anything that were troubling them. Although the store was supposed to have been shut down, the entrance of these delinquents mysteriously triggers the mailbox to connect the past and the present – the letters from the past begins slipping through the mail slot. Are these letters from the past, crossing time to reach them? Although the three are bewildered by what is transpiring, they write responses to the letters, standing in for Yuji Namiya, the owner of the store at the time when the letters were written. The secret of the general store gradually comes to light, as well as a connection to a certain orphanage. The three individuals, who have never seriously considered anyone else’s problems their whole lives, find themselves connected to theses strangers. Will this general store, which has helped so many troubled people decide their path, cause a miracle one last time?