André Montpetit, known as Arthur, passed like a shooting star through the Quebec artistic landscape. An outstanding artist with a boundless imagination, he ignited the world of posters and comics in the late 1960s before disappearing completely. While the "Arthur" myth is alive and well today, a complete mystery surrounds the fate of André Montpetit, the man. Is he still alive? Does he still draw? Through a mosaic of previously unseen works, original animated sequences, and firsthand accounts, filmmaker Saël Lacroix lifts the veil on this emblematic figure of an era now forgotten by history.