The film spans two decades as the story unfolds in a series of flashbacks that begin when Qiyue and Ansheng were just thirteen. The two became inseparable until they met a boy who ended up tearing their lives apart.
The daughter of a right-winger, schoolgirl Jing Qiu is sent to the countryside for reeducation, and tasked to help write a textbook. There she meets Lao San, a young soldier with a bright future ahead. Despite the class divide and parental disapproval, romance blooms against turbulent times.
When 15-year-old Vicky Austin, her sister Suzy and little brother Rob visit their grandfather on Seven Bay Island, Vicky faces several unexpected challenges. Her beloved grandfather, retired Reverend Eaton, seems to be seriously ill, but tries to pretend that nothing is wrong. Vicky met the rich but emotionally troubled Zachary Gray the previous summer, and he reappears to renew the acquaintance. Another boy, 17-year-old Adam Eddington, recruits Vicky to help him with a research project, working with a dolphin called Basil. Vicky discovers she can communicate telepathically with the dolphin and his mate - and possibly with Adam as well
After 29-year-old Adaline recovers from a nearly lethal accident, she inexplicably stops growing older. As the years stretch on and on, Adaline keeps her secret to herself until she meets a man who changes her life.
Wealthy American widower Adam Verver and his daughter Maggie live a refined life in Europe, surrounded by art. Maggie marries impoverished Italian Prince Amerigo, while Adam marries Maggie's friend Charlotte Stant. The Prince and Charlotte are having an affair, which Maggie discovers and navigates through a silent, psychological battle of wills, ultimately using her cunning to preserve her marriage and protect her father.