Yuen thinks that she cannot change the dreadful reality, so she immerses herself in the Internet. A murderer believes that he is "righteous," so he tries to change the world by killing bad people. One day, the killer gets a time machine, and he plans to use it to save the world. But this machine...沅是隱蔽青年，終日沉迷上網。她無法改變殘酷的現實，因而不敢面對它。殺手覺得自己是替天行道，憑著「真理」去殺死壞人，改變世界。後來，殺手拾得時間倒數器，他本以為可以籍此儀器拯救世界。但是，原來時間倒數至零時，整個世界就會變得......
