Returning youth Shen He goes back to village life, where her neighbor Jia Changshun's illegal chicken farm closely presses against her courtyard wall, and severe foul odor pollution heavily disturbs daily life. After communication and mediation hit brick walls everywhere, Shen He densely plants highly volatile mugwort in her courtyard, relying on scientific knowledge to preserve complete evidence. Facing multiple malicious retaliations from the other party, she calmly confronts them, ultimately defending her rights according to law to resolve neighborhood conflicts, and develops mugwort into a characteristic industry, driving rural common development.