While Saffy plans to spend a quiet New Years Eve with her Gran and Justin, Eddie and Patsy prepare to join a huge underground rave party to see in the new year, but things change when word comes of the visit from Patsy's long lost sister Jackie who is notorious for being a 60's party animal. Upon her arrival, Patsy is distressed to learn that her sister (unlike herself) has actually aged in the last 30 years.