Shen Zhao died in a fire in the archives and was reborn a year before breaking off the engagement.
A system fell from the sky - it was supposed to bind her ex-fiancé Lu Wenjing, but it was mistakenly bound to her. The system constantly gives out "optimal suggestions", each of which points to the failed path she took in her previous life.
She refused to obey.
With the memories of her past life, she began to trace the truth behind her father's unjust case, but found a far larger network than she imagined: a project called "Echo", twenty-seven blood samples, an implanted "memory of a past life", and a woman who always stood outside the fire door - Su Jianyue.
Su Jianyue was also reborn. She remembers another version of the future and the choice she made in front of the fire door.
Two women who know the future, one refuses to obey the system, and the other refuses to give up searching for her missing mother. They are opponents, witnesses, and the only ones who can verify each other's truth.
When the truth was revealed layer by layer, Shen Zhao discovered that the system was not a golden finger from heaven. The "past life" might just be a written model prediction, and the independent choice she thought might still be within some kind of calculation.
The only thing she can be sure of is that every choice at this moment is made by herself - even if she can never prove which world it is.
Intent: True freedom is not that the world is finally safe, but that when risks arise again, you can still decide when to face them and with whom to face them.