At three in the morning, programmer Gu Yan is working overtime when a System calling itself "Infinite Worlds" forcibly binds itself to him. His Host number is 000, which in programming means an initial value, a null value, a testing origin.
He transmigrates through worlds of martial arts, technology, and magic, using his code-writer's eye to dissect everything: inner power is a programmable flow of energy, magic circles are integrated environments for high-dimensional functions, and sword techniques conceal redundant code and logical flaws.
The stronger he gets, the faster the worlds collapse.
Because Host 000 isn't the chosen one. He's the first successful test case the System has ever parasitized. His very existence is the most lethal bug in every plane.
"This System is terribly written," Gu Yan says. "I'll rewrite it."