The Tang Dynasty is doomed to fall. The calamity begins at Xuanwu Gate.
"Li Chengqian, even a dog wouldn't be crown prince. I'll teach you how to flip the table."
From death-row prisoner to the empire's shadowy swordmaster, Lin Yuan smashes the feudal clans' monopoly on knowledge and sets out to turn the Tang Dynasty into an empire on which the sun never sets.
On the day of the finale, Li Chengqian holds a knife:
"Teacher, I've cut down all the noble families. Who should I fight next?"
Li Shimin shoves Li Chengqian aside:
"Move. Let me light the teacher's cigarette."
