When cartoonist Hyun-joon falls in love with Da-hong, one of his fans, it sets up the archetypal battle between their two families, who are from rival regions. Hyun-joon comes from the politically liberal Honam region (North and South Jeolla) while Da-hong comes from the conservative Yeongnam region (North and South Gyeongsang). When the two declare their intention to marry, they are confronted with a seemingly endless number of barriers that threaten their happiness.

"Late Blossom" follows the lives of two couples who live in the same neighborhood. Kim Man-Suk delivers milk on a motorbike at dawn. He curses a lot, but actually has a warm heart. One day when he goes up a slope, he meets Ms. Song - a lonely woman who works hards by collecting and selling scrap paper. Man-Suk feels something special toward Ms. Song. Jang Kun-Bong works in a parking lot. Jang Kun-Bong has a wife who suffers from Alzheimer's. He works from dawn until late at night. After work he comes home and takes care of his wife.

Sang-yeol, a 30-something loser stuck in a dead-end job as a home-shopping model, is able to marry the girl of his dreams - his modeling colleague So-yeon - when he discovers she's pregnant with his child. But after marriage an even bigger discovery awaits: the child isn't his - in fact he's still a virgin, and he might even be gay...