A strange crossword puzzle starts circulating amongst Chiri's friends, and they soon begin getting murdered one by one in horrifying ways. At night, Chiri can seemingly view their deaths in her dreams, causing her to lose sleep. Depressed and confused, she wanders into an old orphanage where she spent her childhood and uncovers a long-forgotten link to her past that may help her unravel the mysterious and tragic events occurring around her.

Upon reaching the train station to death, a dejected soul is informed that he is "lucky" and will have another chance at life. He is placed in the body of a 14-year-old boy named Makoto Kobayashi, who has just committed suicide.