Jean Hill, a fiery octogenarian, is deeply concerned about the Great Pacific Garbage Patch - the world's largest landfill. She spends her golden years attending city council meetings and cold-calling residents. Since 2010, she's spearheaded a grassroots campaign to ban the sale of single-serve plastic bottles in her hometown of Concord, Massachusetts. So far, her attempts to pass a municipal bylaw have failed. As she prepares for one last Town Meeting, Jean faces the strongest opposition yet-from skeptical residents, local merchants and the International Bottled Water Association. But her fiercest challenge comes from Adriana Cohen, mother, model and celebrity publicist-turned-pundit, who insists the bill is an attack on freedom.

When Adriana thrusts Jean's crusade into the national spotlight, it's silverhaired senior versus silver-tongued pro. In the same town that incited the American Revolution and inspired Thoreau's environmental movement, can one little old lady make history? A tense nail-biter of a vote will decide. (Angie Driscoll)