A humble migrant worker, Jiang Jiuqing, died of a terminal illness, but was reborn as the mecha warrior S92 Jiu'er. The person in charge, Shen An, said that only by passing the test can he survive. Jiu'er accepted and was taken to special training with the cold-blooded S31 Sanyi. The two admired each other. Although conflicts arose due to misunderstandings, they were resolved in time.
During the relationship, Jiu'er discovered that Sanyi's original name was Feng Yingyue, and his secret. The injury on his left shoulder was caused by the enemy who destroyed the family, and he was willing to sacrifice himself for revenge. Jiu'er was moved by this, made up her mind, and finally passed the examination. Later, when the two went on a mission, after experiencing life and death, Jiuer teamed up with Sanyi to kill his enemy. The relationship between the two gradually warmed up, but they faced a crisis.
Shen An, who was regarded as a close friend, actually wanted to destroy Jiu'er, saying that she was too powerful to be controlled by the organization. Jiu'er desperately escaped from the siege, Sanyi secretly helped her, and the two held on to their hearts in a desperate situation.
From then on, he wandered around the world, finally defeated the evil forces and spent the rest of his life happily.
Purpose: Cherish life