Monga (now known as Wanhua District) is one of Taipei's districts. Mosquito (Mark Chao) and his friends have no illusions about the unwritten laws that prevail in this part of town: if you want to survive here, you’ve got to be stronger than your enemies.
Nées sourdes, Xiao Peng se trouve avec l'équipe de natation pour handicapés dans l'espoir de participer aux Jeux olympiques, aux côtés de sa petite sœur Yang Yang qui l'encourage régulièrement. Y apparaît le jeune Tian Kuo qui, apportant le déjeuner à l’équipe, est bouleversé par la conversation en langue des signes taïwanaise des deux filles et s'éprend pour Yang Yang.
Xuan, une jeune étudiante de 17 ans à l'Opéra de Pékin, est fan du groupe de rock Mayday. Elle rencontre Alei, un adolescent responsable de la maintenance du site Internet du groupe Mayday et établit avec lui une amitié virtuelle.
Naive country bumpkin Chou T'ien Tsai goes to Taipei to meet an internet friend face-to-face. Being a romantic, and believing in 'true love' (he even has a book called Love Is A Kind Of Faith), he is sorely disappointed when his internet friend, Kevin, suggests they have sex with no love. T'ien instead goes to a bar and runs into his ex-classmate Yu and Yu's friend CC. In the same bar, he encounters the 'Number One Playboy' Bai Tieh Nan, who is notorious for one night stands. Despite professing his dislike for 'men who play with love', T'ien can't help but be drawn to Bai.
Police detective Huang Huo-tu, a Waisheng ren (Mainland Chinese) in Taiwan, has been relegated to a mundane job as a Foreign Affairs Officer as punishment for blowing the whistle on corruption in the force, and his colleagues have turned their backs on him. His young daughter is left traumatized after being taken hostage in a gun battle, and his wife Ching-fang is filing for divorce. Huang is on the verge of a severe nervous breakdown.
Yi Yi is an epic story about the Taipei Jian family seen through three perspectives: the middle-age father NJ (Nien-Jen Wu), the young son Yang-Yang (Jonathan Chang), and the teenage daughter, Ting-Ting (Kelly Lee). The three-hour piece starts with a wedding, concludes with a funeral, and contemplates areas of human life in between.
In order to conquer mankind and rule the universe, King Horn sets out to find all seven of the Dragon Pearls. With two of the seven already in the evil king's possession, it is now up to the remaining five owners of the pearls — Son Goku (Son Gohan is the owner, Son Goku is his adopted grandson), Piggy, La Ping, Turtle Man and Seetoe — to destroy King Horn and his two powerful warriors, Zebrata and Maria, before it is too late.