Sophie, A law student visits her brother Gavin as he wraps up his astronomy class. Engaging his sister in the playful arguments that define their relationship, Gavin turns the conversation to Pluto’s Gender. In this, the astronomer reveals that while useful, definitions can be imperfect, whether they refer to planets or people, and when they break down, it’s best to listen to your heart. As Sophie realizes her sibling isn’t talking about planets, Gavin comes out as Gabrielle. Understanding, Sophie embraces her sister’s identity.