18 year old Nelly (Inga Landgre) lives a quiet life in a small town with her foster mother. There, she makes a living giving piano lessons and letting a room to Ulf (Allan Bohlin), who is in love with her. Despite her financial problems, Nelly's foster mother manages to save enough money to buy a new dress to wear at a charity ball. However, when Nelly's real mother, Jenny (Marianne L
