In the underground fortress, censor Lin Wanzhao of the Information Purification Center repeatedly deletes "negative energy" content every day, numbly maintaining a seemingly stable order. A crooked poem with a secret code broke her calmness - behind the words "No roses grow in an iron shell" were the secret joints in the ventilation ducts and the call for rebels. With in-depth contact, she was shocked to discover the truth about the fortress' class structure: the upper-level areas enjoyed real food and fresh meat, while the synthetic protein raw materials in the lower-level areas were actually organic waste, including human remains. With the assistance of the clean-up team Anan, former engineer Lao Bai, maintenance worker Zhao Daheng and others, Lin Wanzhao embarked on the road to pursue the truth, sneaking into the middle area, exploring the abandoned water purification plant, solving the mystery of death on the underground train platform, and gradually uncovering the shady story of rationing, human experiments, historical deletion and other shocking secrets. When she gets the cross key and core data left by her mother, facing the pursuit of the "gatekeeper" organization and the system's all-round monitoring, this resistance with life as a bet becomes the only hope to break the algorithm cage and awaken the sleeping public.
