Eleven-year-old Max identifies as a girl and wants to live her life as Maxine. Her separated parents, Vicky and Stephen, attempt to work out how best to cope with and support this huge life decision.
Cast: Emmett J Scanlan, Callum Booth-Ford, Anna Friel, Lorraine Burroughs, Millie Gibson, Alison Steadman, Sean McGinley, Amy Huberman, Lola Ogunyemi, Gemma Paige North, Dylan Scott, Liam Scholes, Hakeem Khan, Felicity Montagu, Zak Sutcliffe, Kerry Peers, Nimmy March, Colin Stinton
In Boston, Vicky watches as an optimistic Maxine is assessed for puberty blockers. Vicky is determined to support Maxine and forges Stephen's signature on the consent form.
In an attempt to understand and support Max, Vicky and Stephen attend a support group for gender nonconforming young people. The family attend their first appointment at the gender clinic, but Stephen still struggles and ends up making a mistake.
Max's elder sister Lily encourages him to embrace his feminine identity, their mother Vicky fears the consequences and a furious Stephen is driven to a terrible revelation.