In this feature-length documentary, filmmaker Serge Giguère tenderly captures the exceptional creative process behind Martine Chartrand's animated film MacPherson. "Le mystère Macpherson" tells the story of the unlikely friendship between the great Félix Leclerc and the intriguing Frank Randolph Macpherson, a Jamaican chemical engineer who arrived in Quebec in 1917 and inspired the poet to write the song 'MacPherson'.