The Three-Body Problem

The story begins in 1967 during the Cultural Revolution. At Tsinghua University, physicist Ye Zhetai is denounced for teaching modern science, refuses to submit, and is beaten to death in a public struggle session while his daughter Ye Wenjie watches. His wife, Shao Lin, joins the denunciation in order to survive politically and then suffers a mental collapse. Soon afterward Ye loses her remaining refuge when her advisor Ruan Wen dies by suicide. These events leave her isolated and permanently marked by the cruelty of political fanaticism.

Sent to work in the forests of Inner Mongolia, Ye is horrified by mass logging and begins thinking of human destructiveness as something broader than politics alone. Reporter Bai Mulin lends her Silent Spring, which strengthens her belief that humanity may be incapable of correcting itself. When she helps copy Bai's protest letter about deforestation, he betrays her to protect himself. Arrested and pressured to sign testimony that could damage others, Ye refuses even under brutal treatment. Instead of prison, she is secretly taken to Red Coast Base, a highly classified military installation run by engineer Yang Weining and political commissar Lei Zhicheng.

At Red Coast, Ye first hears a cover story about a strategic weapons program, but she gradually learns the truth: the base is part of a project to search for extraterrestrial intelligence and possibly transmit to it. She becomes indispensable because many other technicians deliberately conceal their competence to avoid permanent confinement. Red Coast's documents reveal that Chinese leaders see alien contact as both a scientific opportunity and a geopolitical danger, and that the project is built not only to listen but to speak. Over time Ye discovers that the sun can amplify certain radio transmissions like a gigantic antenna. She secretly tests the idea during a maintenance transmission. The experiment appears to fail, but in fact it sends humanity's first star-powered message into space.

Years later, while living in the emotional aftermath of her father's murder, public persecution, ecological devastation, and her own deepening disgust with humanity, Ye receives a reply. A Trisolaran listener warns her not to answer, explaining that a response will let his civilization locate Earth and invade. The warning is meant as mercy, but Ye interprets humanity as beyond saving and secretly replies anyway, inviting a superior civilization to come. Soon after, Lei Zhicheng discovers the alien message through his own hidden monitoring. Fearing exposure of her contact and convinced of the necessity of her choice, Ye engineers a repair accident and cuts a rope that sends both Lei and her husband Yang Weining to their deaths when Yang unexpectedly joins the dangerous climb. Their deaths are ruled accidental.

Ye briefly regains some tenderness when village families help her survive childbirth and care for her daughter Yang Dong, and later she returns to Tsinghua after political rehabilitation. But a cold reunion with Shao Lin and an encounter with former Red Guards who show no repentance destroy Ye's remaining faith in moral renewal. She meets Mike Evans, a wealthy American environmental radical whose hatred of human civilization mirrors her own. After logging and corruption ruin the forest he has tried to save, Ye tells him the truth about Red Coast and Trisolaris. Evans verifies the contact, builds a shipboard "Second Red Coast Base" on Judgment Day, learns that a Trisolaran fleet is already on its way and will arrive in 450 years, and founds the Earth-Trisolaris Organization, or ETO, with Ye as its spiritual leader. Over time the movement splits into factions: Adventists, who want humanity destroyed; Redemptionists, who revere Trisolaris and hope to save both worlds; and Survivors, who simply want their descendants to endure.

In the present day, nanomaterials researcher Wang Miao is pulled into a secret Battle Command Center led by Chang Weisi after a wave of elite physicists commit suicide, including Yang Dong. Police captain Shi Qiang pressures Wang into helping investigate the Frontiers of Science. Ding Yi, Yang Dong's grieving partner, explains the intellectual crisis: identical high-energy experiments are producing inconsistent results, threatening the basic assumption that physical law is stable. Soon Wang himself is targeted. A countdown appears on photographs he takes and then directly on his retina. Shen Yufei, a member of the same mysterious circle, tells him to stop his nanomaterials research; when he does, the countdown disappears. With Ye Wenjie's help he gains access to astronomical instruments and confirms an impossible fluctuation in the cosmic microwave background, which encodes the same countdown. Shi Qiang insists these events are not supernatural but part of an organized war on science.

Wang begins playing an immersive virtual reality game called Three Body. Across a series of civilizations modeled with human historical imagery, he watches a world repeatedly destroyed by unpredictable eras of heat, cold, and gravitational catastrophe. By observing its clues, he realizes the planet orbits within a three-sun system and that its people, the Trisolarans, have abandoned hopes of solving celestial stability and turned instead to emigration. The game proves to be a recruitment tool for the ETO. Meanwhile, Wei Cheng, Shen Yufei's reclusive mathematician husband, describes his work on the three-body problem and reports contradictory death threats. Police rush to Shen's house and find she has been murdered by Pan Han, exposing a violent struggle between ETO factions. At a later ETO gathering Wang discovers that Ye Wenjie is the organization's commander. Ye exposes Pan and Mike Evans's Adventists as extremists who have hidden Trisolaran communications and secretly aimed at human annihilation. Pan is executed, and soon afterward the military raids the meeting, arresting Ye and many others while Shi Qiang is badly irradiated during a bomb standoff.

Under interrogation, Ye confesses both her contact with Trisolaris and her murders of Lei and Yang. She also reveals that Trisolaris has already sent two near-light-speed protons to Earth to halt scientific progress before the fleet arrives. Human forces then launch Operation Guzheng to seize the hidden Trisolaran archive aboard Judgment Day. Using Wang's nanofilament technology stretched across the Panama Canal, they slice the ship into sections, kill Mike Evans, and recover the data. The captured records show the Trisolaran side of first contact: the lonely listener who warned Earth did so because he saw Earth as a rare, beautiful, stable world and knew his rulers would conquer it. They also show the decision of the Princeps of Trisolaris to invade because Trisolaris needs a new home and fears that humanity's fast scientific development could eventually surpass it.

The final revelation explains the apparently impossible phenomena that have haunted Wang and other scientists. Trisolaris has unfolded protons into higher-dimensional supercomputers called sophons, then sent them to Earth. These sophons can observe humanity in real time, interfere with particle accelerators so that basic physics never advances, and create deceptive effects such as the countdown, messages on film, retinal projections, and the flickering cosmic background. Human secrecy is effectively over. After the recovered messages are read, Trisolaris sends its first direct statement to humanity: "You're bugs!" Wang Miao and Ding Yi fall into despair, believing science has been permanently locked. Shi Qiang drags them to fields swarming with locusts and reminds them that bugs have survived every extermination campaign humans have ever waged. The insult becomes a lesson in endurance rather than surrender. In the closing movement, Ye Wenjie returns to the erased ruins of Red Coast, finds the last traces of the place where she changed history, and watches the sunset as if it were both her own and humanity's.