A high school girl begins a year of sexual experimentation when her mother decides to become a man, and two older schoolmates invite her into their bohemian clique.

This Australian indie captivates through the performances of the young leads. Tilda Cobham-Hervey as Billie, the young woman who has to cope with parental separation, mum's transgender crises, and her own burgeoning sexual awareness, is riveting, a natural beauty who is testing her own strengths and boundaries. Dad (Beau Travis Williams) is over-eager to accommodate everyone, while James (as Mum now wishes to be called) is completely self-absorbed, documenting her transformation and spending the Tuesdays together with his/her daughter only talking about her/his own issues. Little wonder Billie creates a secret space and time to nurture and document her own transformation. These naturalistic, sweet but painful scenes of emerging with the three teenagers are the film's most authentic and touching. Sam Althuizen as Josh remains a mystery, a boy included for his gender more than his personality. The beguiling Jasmine (Imogen Archer) has her own family issues, and provides a brake to any self-pity Billie might be tempted to indulge in.

Del Herbert-Jane as Jane/James embodies the fluidity in gender identification that is the film's key motif. She has a fractious relationship with her own sexually ambiguous brother Harry (Mario Späte),the film's only truly annoying character, a product both of characterisation and performance. That motif is somewhat overplayed. It is deft when the characters all sport fake facial hair for a family goof around, but is hammered home in the changing facial hair fortunes of Dad, who seems to have a different degree of beard for every scene.

Billie's movie-within-a-movie works well and is in keeping with the digital nativization of teenagers of the period. Plot is less well-handled - a rush of all the characters to the hospital seems forced, and Billie's way of marking the conclusion of the one-year separation from Mum rather too showy. The uncle's interventions also seem random and intended to inject drama rather than emerging from character. But as a rites of passage tale the film triumphs, crucially on the casting and performance of Cobham-Hervey. Reminiscent of Kiera Knightley at her best, this young actress is one to watch.

I wasn't looking forward to watching a film portraying a teenager's life week after week over 52 weeks. So I did have low expectations, but I loved this film. What it showed was how one girl, Billie, must cope with an incredibly stressful home life (her mother is becoming a man) while dealing with the usual challenges of adolescence. How she does this is what the film is about. One of the most refreshing aspects was that here, on the surface, is a very much different from 'normal' Australian family -- apart from her Mum's sexual identity crisis, Billie's youngish uncle lives with them, and the uncle's small daughter is an occasional visitor. Billie's Dad is a loving presence but he has his own partner. But by also delving into the family life of Billie's female friend, whose Dad is absent and Mum has depression -- I think the writers were trying to say that no family is perfect, and we all have our woes and worries. And that maybe Billie's family is representative of today's Australia, in that it is diverse. The format -- filming Billie and those around her every week for a year -- could have been terribly monotonous, but the variety of scenes and themes, interspersed with video footage taken by Billie and her friends, effectively breaks this up. The film is well shot, directed and edited. The acting is great and the script is taut. There is plenty of humour and the fairly explicit sex scenes are very much in context and not gratuitous.

I had a sinking but familiar feeling halfway through 52 Tuesdays, a feeling that I had had while watching Mike Mills 'Beginners'. In both films a child deals with their parents coming out late in life. In Beginners, it's an adult man learning that his father is gay, in 52 Tuesdays it's a teenage girl learning her mother is transitioning into a man and now wants to be known as James. In both films, the more interesting of the story lines, belonging to the parents who are going through an incredibly tumultuous time, is sidelined in favour of the narrative of the children which is much more conventional and less interesting.

52 Tuesdays starts out with an interesting gimmick; teenage Billie is abruptly informed by her father that she will now be living with him, leaving behind the cosy bungalow home where she lives with her mother and uncle. Billie can't believe this is true but it is soon confirmed by her mother, who reveals that she is going to be transitioning into a man and needs some time to himself to adapt to his new life. Despite the fact that she is clearly hurt, Billie shifts right away into trying to accept her mother's new state of being. Despite her mother's vague wishy- washy plans, Billie sets out a schedule that involves them seeing each other every Tuesday for six hours and she accompanies her mother to therapy sessions and applauds him as he gets his first testosterone injections. But Billie clearly has some deep pain related to the transition and she chooses to let it out by playing voyeur with two older kids who make out in a closet at school. Her mother's rejection of her pushes her to finally introduce herself to these kids and it isn't long before she's interviewing them about their sexual experiences while experimenting with them herself.

The film is set up in 52 segments and was filmed over 52 weekends but while this is an interesting and at times effective filming technique it also has severe limitations. We get snip its of James's life and how hard it is for him as he faces setbacks in his transitioning but we are also missing large chunks of his story that show his point of view. Billie is also somewhat of a boring character and some of her actions, especially towards her so called friends, are borderline sociopathic, especially towards the end as she invades their boundaries and treats them abhorrently, something the narrative ultimately tries to justify.

It's really too bad because the film had an interesting concept and the stories it is trying to tell are ones that are too often unseen in cinema, but ultimately this movie feels like a shadow of what it could have been.