When the world falls into a silent plague, language becomes a deadly weapon. Three hundred hertz. A frequency that is inaudible to humans was awakened from an experiment that was sealed twenty years ago and is continuously broadcast to the world through satellites. Day after day, it sneaks into every conversation, every song, every cry, penetrating into the human language center like a slow poison.
The infected person loses their emotions, self, and desire to speak within a few hours. They are no longer angry, no longer sad, no longer in love, they will just silently chase all sounds - ambulance sirens, TV broadcasts, even a whisper. They became the quietest ghosts in a silent city, swarming in groups, resonating at the same frequency, like puppets held by the same string.
If the doomsday is silent, your only weapon is silence, and silence is not compromise. Silence is the last resistance.