Li is as deep into the darkness as you can get: cop by day, shadow by night, he eats and drinks the lifeblood of the city. A threat to the current Te Ling Triang Leader is a threat to the City and The Black Dragon cannot be risked. Li is handed the responsibility of tracking down and removing the threat...preferably permanently.
Everyone has a dark side to their personality.
It's the voice in your head encouraging you to eat your partner's chocolate stash or play the CD you bought them before they get it.
It's the side that appears when you get drunk and suggests stupid stunts to impress the ladies.
Delve into the Darkness of my mind, make sure that you bring a torch and spare batteries... teddy bears optional.