Open Water is a short documentary film about what it feels like to swim across the largest freshwater lake in the world. It follows 61-year-old open-water swimmer Marilyn Korzekwa as she attempts to be the first person to ever complete a crossing of the eastern end of Lake Superior, from Michigan, USA to Ontario, Canada. The film uses experimental underwater photography techniques and immersive sound design to convey the subjective experience of swimming non-stop through a night and a day. It chronicles the changing moods of the lake over the course of the swim as Marilyn and her small support crew weather the waves and numbing cold. Along the way, we get to know some of the tight-knit community of Canadian women who have, with very little fanfare, been swimming and helping each other swim The Great Lakes for three generations.