Norval Morrisseau was the first Indigenous Canadian artist to be taken seriously in the art world. By the turn of this century his work commanded tens of thousands of dollars. So when Barenaked Ladies keyboardist Kevin Hearn learned his prized painting was a forgery, he sued. But as Jamie Kastner's doc reveals, there was a cottage industry in fake Morrisseaus, an industry that flourished unchecked for years, feeding on greed, exploitation, racism and contempt.

• Documentary