André Montpetit, also known as "Arthur," passed through Québec’s artistic scene like a shooting star. This extraordinary comic artist and his overactive imagination became widely known in the poster and comic strip world at the end of the 1960s, before disappearing as quickly as he had appeared. If the "Arthur" myth lives on today, the mystery surrounding André Montpetit is complete. Is he still alive? Does he still draw? What is left of his marginal and rebellious life? Via a mosaic of never-before-seen works of art, original animated sequences, and firsthand testimonials, director Saël Lacroix lifts the curtain on one of the era’s emblematic figureheads whom history has long forgotten.