In a Blue Moon is a visually beautiful tale about creating a new life in a new landscape. When Ava and her daughter, Frankie, move to an inherited cottage near Kamloops, they discover that Ava's late husband's brother is already living there. What starts as a tense relationship develops in unexpected ways as Frankie finds a role model in her uncle and Ava grows attached to the companionship of this other man. Through memories and photographs, a tender love story unfolds between the three as they begin to threat together a new understanding of family.