"Ba" offers a positive and affirming portrayal of a young Chinese American man's journey of self-discovery, including his gay identity and a romantic relationship. The film sensitively explores themes of sexuality, family acceptance, and cultural identity, depicting the protagonist with dignity and complexity. The narrative validates LGBTQ+ lives and love, framing challenges as external obstacles rather than inherent flaws in queer identity.

Ba offers an empathetic and affirming portrayal of a transgender teenager named Kai, who navigates his identity and seeks acceptance from his traditional father. The film frames Kai's struggles as external obstacles, highlighting his journey of self-discovery with dignity and respect. The narrative centers on his worth and the validity of his experiences.

Ba centers on the close bond between a single father and his young daughter as they face poverty and danger together, with the father's sacrifices and protective instincts forming the emotional core of the story.