When Saul learned that the girl he had a one-night stand with was hit and killed by a car while waiting for a bus, he was urgently approached by Clarence for questioning.Clarence became interested in the conversation between Saul and Ye Wenjie in the cemetery, because soon after, both Ye Wenjie and Clarence's deployment encountered misfortune.Clarence suspected that this was an assassination operation targeting Saul, because the vehicle that hit the girl was in fully autonomous driving mode, and the original target may have been Saul.For Saul's safety, he was required to wear a body armor and was protected with the highest security level.

Meanwhile, Cheng Jian hopes to carry some of Will's favorite seeds into the stair capsule, but Vader is firmly opposed because he is precisely controlling every milligram of the probe's weight to ensure its speed is not affected.The core personnel of Project Ladder are about to conduct a test launch, and Thor was brought to the United Nations to participate in a ceremony called “Face Plan”.The plan is to prevent Trisolarans from understanding human plans and ideas through language and writing.The United Nations selected three wall-facers, namely General Hou Bolin, Professor Leila Erich and Thor.

However, Thor steadfastly refused to become a Wallfacer. He believed that he was not special and was not qualified to be a hero.He gave up all authority but was shot after leaving the U.N. building.Despite his injuries, Saul remains determined to find the assassins, hoping to understand their motives.

Cheng Jian was very nervous about the test results because the mission was to safely send Will's head into space.She firmly believes that if the Trisolarans find Will, they may be able to use advanced technology to rebuild his body and resurrect him.Even if this possibility is very small, Cheng Jian still has hope because she loves Will deeply.

Thor was confused in the hospital, wondering why the United Nations was still concerned about his safety after he refused to become a Wallfacer.The Secretary-General tells him that what matters is what the aliens think of Thor, not whether he is actually a Wallfacer.

Thor has always been confused as to why he was chosen as Wallfacer, and the Secretary-General hints that there is a deeper reason behind it, but cannot reveal it.At the same time, Tatiana found a message and helmet from the mysterious organization in her residence, inviting her to enter the game world.Will's head was sent into space, and Vader revealed that he had also sent seeds into space, hoping that the Trisolarans could rebuild Will and grow plants in space to create living space.

Oji uses nanofiber technology to improve the quality of life of poor people in Mexico.Although she tried to stay away from the Trisolaran thing, her technology played a key role in Will's mission to space.However, the ladder plan failed when several detonations caused the nanofibers to break, causing Will to veer off course.Vader received direct contact from the Trisolarans on the plane, and they seemed to be trying to interfere with his mind.In order to comfort Saul and Cheng Jian, Clarence took them to see the locusts to show that even in the face of difficulties, life still has its tenacity and tenacity.