A story set in 19th century China and centered on the lifelong friendship between two girls who develop their own secret code as a way to contend with the rigid cultural norms imposed on women.
Ning Ning is a new student at her school, where her passion for singing helps her form a relationship with a boy in her class. Together with their friends, they fight the odds to participate in an inter-school singing competition.
Wu Qingqing is an agent of the International Security Alliance (to combat mutant crime) and is ordered to infiltrate Medusa Plastic Hospital to collect evidence of the secret research on genetic induction fluid by its direct consortium to create mutant fighters. Wu Qingqing successfully infiltrates, but was forced to inject a gene induction fluid.
