About the title
One fine morning, the residents of a quiet suburb receive red envelopes. Each contains a letter with a photo of one of their neighbors who is to be killed, along with a note saying that the same letter, with a photo of the recipient, has been sent to that neighbor. A divorced woman with two teenage children takes it for someone's stupid joke and goes to chat with her friend and neighbor — the one with whom, according to the letters, they are supposed to kill each other.
