Yang Chen developed the "Dead" app. After being broken up by his girlfriend, he became an agent of Yin and Yang, walking between the Yin and Yang worlds. Help the ghosts in the underworld realize their wishes, obtain their various abilities during their lifetime, and assist the police in solving various strange and difficult cases such as gold robberies and underground casino cases. He accumulated connections, wealth, and established a business empire that spanned the Yin and Yang realms.
