Francis Lai composed fabled melodies for the silver screen—but his rich work goes beyond cinema. Mireille Mathieu’s “Une histoire d’amour” reprises the misty-eyed symphonic flourishes Lai wrote for the Oscar-winning score of Love Story (1970). It meets playful, piano-laced singalongs from the film Un homme et une femme, as well as vibrant chansons Lai composed for legends like Yves Montand.