Road to Avonlea (1990)

Season 1: Episode 12

aka ""The Blue Chest of Arabella King"" Arabella King, a distant relative, was jilted at the altar, and left all of her wedding finery in a chest which sits in the King Farm kitchen for years. The curious Sara and her cousins Felix and Felicity try to persuade the adults to open the chest. Upon the notification of Arabella's death, they are free to open the chest.Aunt Olivia has begun working for the newspaper and finds a story in the contents of the chest. With the help of Sara and Jasper Dale, Olivia gets her story and solves an old mystery. Jasper and Olivia also discover they share a mutual interest in one another.