Un ser extraño de pronto entra a la casa de una familia y los pone a todos a refunfuñar; los papás comienzan a pelear, la hermana se pone de malas y genera desastres por doquier. El niño debe idear la manera de sacar a esta criatura tan peculiar llamada "Refunfuña".------------------------------------------------------------------------------------------This is a story about a strange creature that suddenly invites himself inside a family's home and starts to make them all grumble. His presence causes the parents to fight and puts the sister in a bad mood. The boy must find a way to get this peculiar creature named Grumbler out of his house.