In the prosperous "Xiguang City", Gu Xiaozhou is a young man with "Chinese Disease" who firmly believes that he is the "Shadow Apostle" and shoulders the heavy responsibility of protecting the world. He is just an ordinary graduate who has failed in interviews many times, but his passionate and unreliable belief has never wavered.
Until one day, his "chuunibyou" began to affect reality: the "runes" he drew casually could cause the elevator to malfunction; the "power of chaos" he muttered could make rocks float; even the "old enemies" he thought began to appear, but they might be salesmen or unemployed entertainers.
Faced with these ridiculous "powers" and "enemies", Gu Xiaozhou decided to launch a "save the world" plan seriously. How will he use his unreliable "superpowers" and even more unreliable "secondary" logic to trigger hilarious and heartwarming farces in the urban jungle, and compose an urban supernatural comedy with the city and the strange people around him?