两位居住在牛津郡乡村的业余侦探在当地河流中发现了濒死的鱼。当他们联系供水公司寻求解释时，公司古怪而闪烁其词的回应促使他们展开调查，而这项调查一直持续至今。 该剧改编自真人真事，讲述了牛津郡自来水公司污染河水事件。
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