The Partridges are booked for a huge European tour. However, the booking agent in charge of the tour thinks that Shirley is too old and won't book them if she is part of the group. This then causes Shirley to doubt her continuing role in the band and contemplate retirement. However, the kids conspire to keep their mom from becoming a retired rock and roll star even to the point of intentionally giving a bad performance.The next day, Keith and Laurie go to Logan's hotel room and learn the real reason behind Shirley's sudden resignation. Furious, they try to get their mother back in the group by deliberately messing up a nightclub performance in front of Logan. When that fails, they all decide to quit until Shirley tells them she'll join the group after the tour. (thetvdb.com)