After Eight Years Undercover, I Became the Second in Command of the Gang.

After being undercover for eight years, I became the second-in-command of the gang. The boss is critically ill and wants to pass on the entire group and sister-in-law to me! I'm here to crack down on gangsters, not to be the boss or marry the sister-in-law! The sister-in-law holds the shady story of the entire entertainment industry and traffic industry in her hands. If I don't close the net, I will really become the Emperor of Darkness!