Hundreds of years ago, our ancestors set off from Earth on a migration spaceship and embarked on an unknown journey to survive.

They went in too much hurry, all the equipment was immature, and some had not even been tested. But they ended up on the planet we live on now, over Eden.

At this time, the hastily pieced together migrant spaceship finally could not support it, he shattered into hundreds of pieces, scattered into this world, and then collided, exploded, and burned, many people died in the process, and most of those who survived were dying, and then an immature earth technology saved them - genetic injections.

Because of the uncertainty about their future living conditions, the migrants were each given a genetic injection before departure, which allowed humans to quickly develop genetic mutations that would allow them to survive in a harsh near-death environment.

Genetic injections have played a role, some people have survived, but they have mutated, and some have become completely different from humans, in addition to sadness, they according to the characteristics of their own mutations, from the ancient mythology of the earth to name their mutated race: so elves, tree elves, dwarves, demons, orcs, ant-men, Naga and other races have appeared in this new world.

With the passage of time, the new races roam in this new world, looking for each other, building new cities, regaining lost technology, creating new civilizations, and at the same time their genes have stabilized, no longer continue to mutate and with the emergence of the new generation, they are slowly recovering some human characteristics, which makes everyone happy, but occasionally, when some new generations are in a near-death state, this adaptive mutation will suddenly appear, scientists call this phenomenon the new atavism, Due to the unknowability of mutation may pose a threat to society, most of the countries and various regional organizations and tribes on Eden have set up corresponding institutions to deal with this threat.

In a regional city composed of chambers of commerce, the metropolis, this agency is called the Special Investigation Bureau, and a group of excellent biologists and anthropologists have become the main technical support force of this organization; There are also plenty of adventurous bounty hunters who have joined the agency.

There are also some overlooked people in the agency who wield the powers and resources of the Special Investigation Bureau, and they are the administrators appointed by the Metropolitan Board of Directors.

And the story I'm going to tell you today revolves around a beautiful veteran female forensic officer in the Special Investigation Bureau and a novice bounty hunter.