In dystopian near-future, news reporting informs people of a mysterious yet fatal epidemic which is transmitted through conversations. Everyone in the city, including Kar-him, are advised to wear earmuffs and to avoid talking to strangers and colleagues alike – even dialogue cards had to be disposed. Kar-him continues with his unremarkable life in silence just like all others, yet doubts linger in his mind. A homeless guy was hauled off when he decided to reveal more than he should; Refusing to stay silent, Kar-him started a dangerous quest to find his father who disappeared after he mentioned about knowing the homeless guy.