食物垃圾问题在全世界普遍存在。随着中国城镇化的加速发展和居民收入水平的提高，食物垃圾量也成指数式增长。导演游走在大街小巷中、去了社区、学校、餐厅、还有环保公司，试图探寻在上海这个拥有约2500万人口的大都市里，食物垃圾是怎样循环与再生，目前运用了哪些创新举措去解决这个问题。藉此也想引发人们对于食物的珍惜，以及对自然环境的保护。

Food waste is a problem all over the world. As China's urbanization accelerates and incomes rise, the amount of food waste is growing exponentially. The director has been roaming the streets, neighborhoods, schools, restaurants and environmental companies, trying to find out how food waste is recycled and what innovations are being used to tackle the problem in Shanghai, a metropolis of about 25 million people. It also wants to inspire people to cherish food and protect the natural environment.