西門五妻金蓮與西門女婿陳經濟隔窗偷光， 相送信物。 一日在偷香, 被丫頭春梅看到，金蓮怕泄幽情，迫使春梅受用於陳經濟，陳經濟一箭雙雕， 從此春梅與金蓮為心密加心蜜。

Ximen’s 5th wife Jin and Ximen’s son-in-law Chen fool around through window, they also exchange token of love. One day when they are having an affair, Jin’s maid Mei walks in. In order to cover the scandal up, Jin makes sure that Chen takes advantage of Mei, so Chen enjoys two-birds-one-shot. From now on, Jin and Mei are bonded together in mind, mentality and emotion.