According to legend, if a person dies, his body will decay with the passage of time, but his soul will be eternally reincarnated with the world. If he has suffered great injustice in his life and died with hatred, usually this person is mostly resentful. After death, his soul will not leave the body for a long time. He will form a resentful spirit to cause harm to the world, cause harm to mankind and be feared by the world, and become a "ghost". And when some people fail to fulfill their wishes while alive, their souls will be attached to the most precious thing in their lifetime. Only when they get the owner of this thing again and fulfill their wishes, can their souls be freed...