The feature film revolves around a mother employed at an ammunition manufacturing company who discovers that she unknowingly made the bullet which was responsible for her own son’s death.。目前,开封市对已排查出的4名确诊患者的密接和次密接人员,均已实施集中隔离医学观察;涉及外地市人员,已向相关地市发送协查函;进一步的流调工作还在进行中