The surface has become a dead land, and giant snails as enormous as mountains are humanity's last arks. Their shells keep death at bay, but also imprison billions of people, leaving them to await their fate of being digested by the giant snails amid hunger and toxic gas. Everything changes when Lu Yun discovers that the mysterious green sprout that has accidentally bonded symbiotically with his body can devour anything and evolve without limit. Survival supplies, physical attributes, advanced technology, and even sequence abilities capable of defying the world's rules can all be unlocked. Alongside the intelligent EVA, he ventures through bizarre indigenous tribes and narrowly escapes apocalyptic disasters, rising from the very bottom to the top. He is determined to shatter this prison and uncover the origins of the giant snails and the truth behind his transmigration.