2007年，地球基础科学出现了异常的扰动，一时间科学界风雨飘飘，人心惶惶。离奇自杀的科学家，近乎神迹的倒计时，行事隐秘的科学边界，神秘莫测的《三体》游戏。纳米科学家汪淼（张鲁一 饰）被警官史强（于和伟 饰）带到联合作战中心，并潜入名为“科学边界”的组织协助调查。迷雾之中，汪淼接触到一个名为ETO的组织，发现其幕后统帅竟是自杀身亡的科学家杨冬的母亲叶文洁。随着ETO与作战中心你来我往的不断博弈，汪淼和史强逐渐确定《三体》游戏中的世界真实存在。而所有事件的源起，是两个文明为了生存空间，孤注一掷的生死相逐。在联合作战中心及科学家们的共同努力下，汪淼、史强等人坚定信念、重燃希望，带领大家继续准备着在今后与即将入侵的三体人展开殊死斗争。

In 2007, there was an unusual disturbance in Earth's basic science, and the scientific community was in a state of turmoil and fear. Bizarrely suicidal scientists, near-miraculous countdowns, scientific boundaries acting in secrecy, and the mysterious and unpredictable game of "Three Bodies". Nano-scientist Wang Miao (Zhang Luyi) is brought to the Joint Warfare Centre by police officer Shi Qiang (Yu Hewei), who infiltrates the organisation known as Science Boundary to assist in the investigation. In the mist, Wang Miao comes into contact with an organisation called ETO and discovers that the commander-in-chief is Ye Wenjie, the mother of Yang Dong, a scientist who committed suicide. As the ETO and the Combat Centre continue to play back and forth, Wang Miao and Shi Qiang gradually determine that the world in the game "Three Bodies" really exists. And the origin of all the events is a desperate life-and-death competition between two civilisations for survival space. With the joint efforts of the Joint Warfare Centre and the scientists, Wang Miao, Shi Qiang and the rest of the team are determined and hopeful, and they continue to prepare for the fight against the invading Trisolaran in the future.