18 Grams of Love

Zhihua and Ah Hui are two longtime friends, who both suspect that their wives are cheating on them. In order to allay their suspicions, they decide to 'test' their wives by each writing a love letter to the other’s wife, to see if she will respond. But as they get caught up in their ploy, they start to ignore their own wives. Subsequently, their lonely wives also start to respond to the love letters that they received. One day, Zhihua’s wife writes back to Ah Hui and proposes a meeting in a love hotel.