"I Am Gitxsan" follows Phoenix Apperloo, a recent high school graduate reconnecting with his Indigenous heritage in Hazelton, British Columbia, Canada. Inspired by encounters with residential school survivors, he writes a heartfelt letter to Prime Minister Trudeau about the injustices faced by his people. The documentary highlights the impact of colonialism on the Gitxsan community, featuring insights from experts like Dr Gabor Maté and showcasing their resilience through protests and legal actions.