 When Susan and Mary s younger sister Lisa returns home from classes in London, she is welcomed as the  baby girl , but Tom soon finds out she has grown up and wants to accept an invitation to join friends on a site-seeing trip trough Euripe and study art history, not nursing nor commuting with the car her parents have ready for her. Chris warns him in-laws like them have no real vote in family affairs, but Tom tries to enlist everyone to encourage Lisa to stand up for her dream against their parents  expectations.