The year is 2078. The robot girl AINOA is programmed to control the "great atomic war" in the past. The scientist who constructed her - DR. KERENSKY - comes to understand the mistake he made and, in 2014, withdraws to an underground shelter with a group of trusted friends. The resistance movement he calls "Mission" stays below the surface for three generations, waiting for the war to end. In 2071, they leave the shelter to find Ainoa and re-program her in order to stop the war in the past. They kidnap Ainoa from a military prison, but the only one surviving a government scheme to retrieve Ainoa is YURI, a member of the Mission. He escapes with Ainoa and seeks refuge with his sister Kei who left the Mission years ago to live her own life. She never believed that the world could be saved. However, Yuri persuades her to come with him to prevent the catastrophe. Yuri's one clue is the "prophecy", the Mission's "bible", consisting of audio tapes recorded by Dr. Kerensky in the shelter in the days before he died. But the information on the tapes is far from complete. However, things develop differently than expected: Ever since she was freed, Ainoa has begun to develop her senses, her sense of self. She opens up. The seemingly lifeless, emotionless android evolves into a living being, gradually becoming more human. She starts to speak, to perceive, to enjoy, to mourn. Yuri is more and more impressed by this girl developing at his side, and falls in love with Ainoa.

Ainoa learns to recognize life, to value and love life, which ultimately allows her to decide to act against her own programming and thus save the world. In the end, it becomes clear that Dr. Kerensky very thoroughly planned the course of things to come to provide for Ainoa's development in this very direction, in order for her to decide in favour of the world and its salvation.

In the end, the lovers Ainoa and Yuri face a question: If we change the past, and everything is different... will we still know each other? Will we love each other? Will we be together?

Well, let's just say, the story ends well.