On a rainy day when six siblings are home alone with their pet fish while their mother is out of town for the week. A tall cat wearing a hat appears and creates havoc in the house. Meanwhile, a greedy evil aristocratic neighbor wants to marry the kids' mother, and one of the kids opens the cat's magic suitcase, that the hat-wearing giant feline told him not to open. it's up to the cat and the kids, with help from the cat's helpers to resolve these problems.
