As one brother (Vincent London) is proving himself as a soldier, the other (Guillaume Canet) is noting the last requests of his dying mother, a respected herbalist within the community. Though Arnaud (Canet) promises to carry on the family tradition, his plans are thwarted by a vicious band of horsemen who beat him into a three-day coma. When he wakes unable to speak or recognize his family, his wife (Melanie Doutey) sends a mercenary to find Thomas (London). Guillemette (Douty) and Thomas set off in hopes of finding a book containing the plant know-how they need in order to honor the late herbalist's wishes, but the tradition is primarily oral, and the books available on the subject are closely guarded by the clergy. Though Guillemette herself cannot read, she realizes her family's future depends on the existence of such a book. Making things even more complicated is the romance blossoming between Guillemette and Thomas, despite the shared relationship with Arnaud. This costume drama is set in southern France during the middle of the 13th century, and was directed by Pierre Jolivet.