Date of Death- Jungkook ff(FINSIHED)

Y/n received a letter in the mail saying only the supposed date that she would die. The date was only a couple of months away...She figured it was a sick trick from one of her friends but...what if it's not? Jungkook, a random guy she met from her friend who says he can help figure this out, was paid to help her for some quick cash even though he has no idea what is actually is happening. Will Jungkook and Y/n figure out the meaning before it's too late?