Alanis Obomsawin is one of Canada's great documentary filmmakers, and is considered one of this country's indigenous heroes.
For more than 40 years, she has told the stories of First Nations people and explored Canada's history.
In her film 'Trick or Treaty', Obomsawin digs into Treaty 9 - the 1905 agreement which ultimately led to First Nations communities losing sovereignty over their traditional territories.
The film follows the journey of First Nations in northern Ontario in their quest for affirmation of their treaty rights.
You can watch it Saturday, June 20, 2015 at 7pm on CBC Television.
Last year, it screened at the 2014 Toronto International Film Festival - making Obomsawin the first indigenous filmmaker to screen in TIFF's prestigious Masters program.
"When we talk about our people, or talk about our history, and you mention the word 'treaty' it's nothing to people," said Obomsawin.
"They should learn what the real truth is about the people who came here that were strangers and robbed us of everything and damaged a people and used their naivete, to make them believe something else. That's important."
For highlights from the film, watch the trailer at the top. And check out this clip from Obomsawin, talking more about Canada's history.
Obomsawin also did a feature interview on CBC Radio's Q, where she spoke about the treaty, the deception by Canadian governments, and the challenge of bringing the story to the screen.
She has directed more than 40 films. Her first, 'Christmas at Moose Factory' debuted in 1971, while her most famous film 'Kanehsatake: 270 Years of Resistance' followed the Oka crisis in the summer of 1990.
As part of National Aboriginal Month, you can check out more great films and series on CBC by clicking right here.