When Naissa tells his mother Daniela that he identifies as a trans man she struggles to understand. Through candid personal letters exchanged over three years, Dear Mamma follows Naissa as he stands firmly for his independence and identity, and Daniela as she wrestles with her fear of losing a child. As Naissa embarks on his professional dance career and proudly embodies his gender, his mother also embarks on a journey of understanding and acceptance of her son’s choices