Zu, a free spirit estranged from her family, suddenly finds herself the sole guardian of her half-sister, Music, a teenager on the autism spectrum whose whole world order has been beautifully crafted by her late grandmother. The film soon challenges whether it is Zu or Music who has a better view of the world, and that love, trust, and being able to be there for each other is everything.
Lady Bird McPherson, a strong willed, deeply opinionated, artistic 17 year old comes of age in Sacramento. Her relationship with her mother and her upbringing are questioned and tested as she plans to head off to college.