Commissioned by the designer Miu Miu as part of a series of seven films, “Women’s Tales,” Spark and Light is a lovely and wonderfully executed short by Treeless Mountain director So Yong Kim. Riley Keough, in a sensitive, affecting performance, plays a motorist stranded in snowy Iceland as she’s on her way to visit her dying mother in the hospital. Dreams, memory and reality all merge as Keough’s character turns her moments alone into a hypnotic emotional journey. Special mention to Eric Lin’s subtly expressive cinematography.