After a devastating natural disaster, hundreds of thousands of humans migrated to the asteroid belt between Mars and Jupiter. Thus begins the Asteroid Belt Era. In the year 32 of the New Era, Cole, once an excellent LEAB's field agent, insists on revenge after his daughter Ling was murdered, and his pursuit of clues eventually led to the death of his former friend, Chen Xingchen. Remorseful, Cole lives a drunken life until he discovers that there is more to the story than meets the eye.Driven by the desire for revenge and exploration, Cole gradually approaches the mastermind behind the crime and the deeper conspiracy.