Dear Mr. Watterson is a documentary that delves into the influence and legacy of the beloved comic strip 'Calvin and Hobbes' and its creator, the elusive Bill Watterson. The film explores topics such as controversy, reclusiveness, artistic integrity, and the commercialization of art. Through interviews with fans, historians, and fellow cartoonists, it delves into the enduring impact of the strip and its creator's refusal to embrace commercialism.