Thirty years after the technological disaster, in the ruins of Rust Belt City, Ling Ye made a living by dismantling the "garbage" discarded by the floating city - until a piece of alien debris was embedded in her biochip and activated the [Broken Star Analysis System].
This system never issues killing missions, but only forces her to dissect the core of black technology: dismantling mechas requires finding energy loopholes, and repairing time machines requires confronting the afterimages of time and space. The Star Ring Organization in the Floating City is using genetic locks to imprison the lower level, using memory tampering to cover up the truth, and even developing an "erasure program" that can destroy all underlying technology.
When Lingye saw clearly through the light blue chip in her right eye the truth behind the massacre of her family - that the disaster was originally a conspiracy of Star Circle, she tightened her grip on the wrench filled with engine oil: not only did she want to use the enemy's technology to fight back against the enemy, but she also wanted to let the children of Rust Belt City see the real starry sky again.
