Big sister takes her little brother out for a day of games and adventures while their parents are away.

Nelly spots Ricky on the street and tries to shout at him, but he can't hear her and disappears around the corner. Aunt Serena is surprised to see Ricky in the shop, exploring the candy shelves, when she should be at home vacuuming. Downstairs neighbour Lennart Lindberg asks Ricky to go fishing, but he never shows up. Is there a Ricky look-alike in town? And if so, where and why has he come to the neighborhood?