Mary is a gas-station attendant with an epileptic son who can barely make ends meet, when she makes them meet at all. She has dreams of a forbidden love but can't focus on those dreams when she can't even buy her son's medicine. She has a real knack for staying calm under pressure, and steadfastly does what she needs to in order to keep food on their table and a roof over their heads. One day she has an encounter with a woman who claims she can...