Set in the 1980s, troubled youth Chan Lok-kwun accidentally enters the Walled City, discovers the order amidst its chaos, and learns important life lessons along the way. In the Walled City, he becomes close friends with Shin, Twelfth Master and AV. Under the leadership of Cyclone, they resist against the invasion of villain Mr. Big in a series of fierce battles. Together, they vow to protect the safe haven that is Kowloon Walled City.

Have you ever wondered how you will age? Four 60-year-olds, two twilight loves, their love is kind and pure, romantic and intense. In this limited journey of life, before it is too late, one wants to say "I love you!

Li Tang Zhen is a 40-year-old single woman who lives with her niece and nephew whom she has been taking care of from their childhood after her brother got remarried. Although she used to write novels using her pen name Xiao Baihe, she supports them by working at a supermarket. One day, out of curiosity, she plays an online game and meets college student Xihao Jihan, a fellow player. They become close over a period of time and things start to get complicated when Jihan wants to meet Bai He in real life.