Their father, Gerald Fedden, has just been elected a Conservative Member of Parliament, and they are all set to begin the privileged life of celebrity politicians, although they must hide their various problems: Toby's drug addiction, Catherine's mental illness, Gerald's philandering.
Sounds a lot like Brideshead Revisited, doesn't it?
He dates Wani Ouradi (Alex Wyndham, below), the closeted heir to a supermarket chain, who is engaged to a woman and happy to keep their relationship a secret. But Wani cruises constantly, even having sex with Jasper, Catherine's fiance. Eventually Wani, too, becomes sick.
By 1987, the various scandals in the Fedden household have been revealed to the Press, and Gerald has no choice but to resign as MP. He blames Nick for all of his problems, and kicks him out of the family that has been his own for four years.
But I do remember the secrecy -- you simply did not tell heterosexuals. You dropped pronouns; you lied about your weekend activities; you invented girlfriends. If they found out, you could expect disgust, yelling, excoriation, and then silence, as they cut off ties with you forever.