Li Yuan: My father died young and left me in the lurch! To carry on the Li family's tradition of screwing over sons, I'll screw over Erlang!
Li Shimin: My father made me risk my life and often tricked me by promising to make me Crown Prince! Luckily, I made it all back at Xuanwu Gate!
Li Fu: As Li Shimin's eldest legitimate son, I finally understand why he nearly got me killed. Even after we finally recognized each other, he kept screwing me over! So this is a Li family tradition! Li Shimin, you'd better remember that your life is in my hands! Your life depends on me! The tradition of screwing over sons ends with me.
Li Shimin: Father! I'm an emperor for the ages, but I've let down the Li family tradition! I only wanted to screw over one son, so how did I end up getting screwed over so badly by him?
Li Yuan is overjoyed: Great! My grandson has finally paid you back for all my suffering!
Li Shimin screws over his son, Li Fu gets back at his father, and this father and son go on to create a golden age…