Ingmar Bergman 's screenplay is adapted for radio by Shaun McKenna. Set in the enchanted birch groves of Sweden at the beginning of the 20th century, the script was the inspiration for Stephen Sondheim 's stage musical A Little Night Music. Fredrik Egerman thinks himself content with a child bride the same age as his son, until he sets eyes on his past love -the vivacious Desiree Armfeldt. Director Marion Nancarrow