Auguste Maquet, the unsung co-writer of "The Three Musketeers", remains unknown to the public, while Alexandre Dumas is widely credited for the swashbuckling classic. Charlotte Desrives, the lovely daughter of a doctor imprisoned for his political beliefs, mistakes the shy Maquet for the fiery ex-revolutionary Dumas and begs him to help release her father.

Dumas
The film explores the intricate and artistic bond between Alexandre Dumas and Auguste Maquet, whose partnership is threatened when Auguste's romantic obsession with Charlotte, a devoted admirer of Dumas, leads him to impersonate his collaborator.