Denise and Vanessa cannot believe that their cheerful Granny has gone senile after their grandfather's death. They decide to kidnap Granny from their domineering aunt and take her stay with them for a holiday in the family caravan on the coast. Once there, they discover that looking after an elderly relative isn't easy. Will Denise and Vanessa be able to cope? And can they unravel the secrets of Granny's own teenage years?