Attorney Robert Bilott works in Cincinnati for a firm specializing in the defense of large chemical companies. On the verge of receiving a promotion, Bilott receives an unannounced visit from a farmer named Wilbur Tennant. Tennant, who knows Bilott’s grandmother, wants the lawyer to help him figure out what killed his cattle. Out of debt, Bilott visits Tennant’s farm – and is shocked by what he sees. He decides to investigate the situation, being sure he will win the case. But before that, he realizes that humans, besides animals, are poisoned.