Lindi and her brother go to the sea with their grandmother, taking a little wooden boat to play with that their grandfather has made. They quickly make a new friend and play together with the boat in the sea and then have a picnic. No one notices the sea creeping in until it has taken their boat away. The children are upset but find a special shell to take home for their father to make up for the loss of the boat he had given them. He says he can always make another boat but that he could never make anything as beautiful as the shell.