"The moment I touched that blue crystal, my time began to flow backwards—but it also imprisoned me in time forever."
Cheng Yan, an ordinary college student, accidentally fused the "Key of Time" fragments while working and gained the ability to rewind time. However, he was involved in the thousand-year struggle between the Superpower Management Bureau and the Dark Crow Organization. As his abilities evolved, he found that he was seeing more than just the past - the blue cracks spreading under his skin, the superimposed flashes of parallel time and space, and the burning mark on his chest all reminded him of a cruel truth: time is never free.
When the mad scientist Su Xue of the Dark Crow Organization tries to reassemble the Key of Time to rewrite the future, and when his childhood sweetheart mentor Su Yu confronts him with a family blood feud, Cheng Yan must make a choice: become a prisoner to save the world, or the key to destroy time and space?
