In Jiangzhou city a new synthetic drug called "蜜蜂" (Bee) is devastating the drug market and causing multiple deaths among teenagers . After the drug's creator, is arrested and executed, the formula faces extinction—creating panic in the underworld .

A couple living in a poor mountainous area leads a peaceful life with their young son. Tragedy strikes when a fire engulfs their home, leading the father to lose a leg while saving their child, and the mother to donate her corneas, resulting in blindness. As the son grows up and moves to the city, he distances himself from his humble origins, only to later realize the depth of his parents' love and sacrifices.