為了喚回清淨的人心，藉以重現夢中流動的溪河，新竹縣峨眉鄉一群環保義工發起愛鄉協會組織，集所有成員之力從最簡單的生活環保做起，企圖以行動來教化他人，進而培養其熱愛鄉土的情懷。 《淨湖人》以記錄「峨眉愛鄉協會」的愛鄉人故事為主，透過幾個主要人物，例如茶農黃森昌、國小校長張良鎊、攝影家葉裁，以及陶藝家鄭永國等人的觀點，讓觀者從他們身上，了解及反思經濟快速發展對環境的種種破壞。 A group of volunteers in Ermei Township in Taiwan established a group named "Love for Ermei Township". All members of this organization commit to live as simply as possible and also try to influence others to love their land. Lake- Cleaning People is based on stories of those who love Ermei Township: tea farmer Huang Sen-Chang, principal Chang Liang-Ban, photographer Yeah Tsai, pottery artist Chen Yung-Kuo and others. Viewpoints reflected in their oral histories and experiences aim to stimulate viewers to rethink the impact of fast economic development upon environmental damage.