The world is still the same world, at least on the surface it is. There are still many tall buildings, the traffic is still noisy, people are running for a living, anxious about housing prices, and worried about what to eat for breakfast tomorrow. But if you are careful enough, or like Lin Feng, who is reborn from a hardcore Pokémon player to the Blue Star in this parallel world, you will find that something is different. Occasionally, there will be an unspeakable "energy fluctuation" floating in the air, and there are always some obscure "mysterious creature" reports in the news corner that are quickly taken down. Late-night urban legends begin to be mixed with some too real and spine-chilling details - such as yellow-skinned rats that can discharge electricity, or small lizards that breathe fire. This world is slowly but surely sliding into a familiar yet unfamiliar track, a prologue that latecomers call the "Pokémon Era."