Between 1934 and 1941, the City of Los Angeles sent 2,000 men to work on aqueducts and an 11-mile tunnel beneath volcanic craters in the Mono Lake Basin of the Eastern Sierra. MONO tells the story of fish biologist Justin Hearth, as he surveys the waters of the Mono Lake watershed, falls in love with that landscape, and also with Alisa Stohler. Her family had been forced from a farm in the Owens Valley in 1930 and is now caught up in changes brought by the distant city's unending thirst for growth. This story explores the minds and hearts of a generation shaped by the Great Depression and facing the threat of world war. MONO confronts the question, "What were they thinking back then, as choices were made that endangered Mono Lake and its tributary streams?