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.

Ho Sau, an undercover agent, has been working with Yau, a drug lord, for years, but his job and family are in trouble.

Four telecom employees begrudgingly join the company’s dragon boat team to help keep them immune from encroaching layoffs only to discover themselves.

Just out of jail, Fai finds a spot on a street corner where other homeless people welcome him. But he doesn’t get much time to settle in. The police soon chase them away, and their possessions disappear into a garbage truck. Young social worker Ms. Ho thinks it’s time to fight this in court. In the meantime, Fai and his friends have other concerns.