Environmental toxicants in the city of Woburn, Massachusetts, contaminate the area's water supply and become linked to a number of deaths of local children. Cocky Boston attorney Jan Schlichtmann and his small firm of personal injury lawyers are asked by Woburn resident Anne Anderson to take legal action against those responsible. After originally rejecting a seemingly unprofitable case, Jan finds a major environmental issue involving groundwater contamination that has great legal potential and realizes the local tanneries could be responsible for several deadly cases of leukemia. Jan decides to go forward against two giant corporations that own the tanneries—Beatrice Foods and W. R. Grace and Company—thinking the case could possibly earn him millions of dollars and boost his firm's reputation.