Wang Xue'er suspects his wife is cheating on him and plans to go out for a change of scenery. But his grandmother sees right through him. To ease his worries, she tells him the heartbreaking, almost unbelievable love story between herself, his grandfather in Taiwan, and the woman his grandfather married there.
The story is tragic and moving, but Wang Xue'er is too comfortable to appreciate it and remains unmoved. Left with no other choice, his grandmother casually suggests that he get a job at a construction site. Driven by contrariness, Wang Xue'er eventually makes his way to the site, where he learns about the hard work, joys, sorrows, and worries of the migrant workers. His firsthand experience and hard lessons there finally help him understand his grandmother's good intentions, and bring about a profound transformation in his life. His boss even promotes him to deputy manager of the company. Just as Wang Xue'er is preparing to take up the post with confidence, he hears that his uncle in Taiwan was captured by pirates while fishing at sea, and that his grandfather is critically ill. Invited by his step-grandmother, Wang Er has no choice but to accompany his father to Taiwan to see his dying grandfather. But just as his grandmother predicted, the old man passes away as soon as he sees his eldest son and eldest grandson. As Wang Xue'er and his father help their step-grandmother with the funeral arrangements, they finally learn about the agreement between their grandmother and step-grandmother. And the mysterious agreement Wang Xue'er has been so eager to learn about turns out to be...
