Brotherhood of the Wolf is a conspiracy movie, set in the 18th century, made to look like a martial-arts film, with dialogue in French. That description should be interesting enough to at least check it out.
The plot is elaborate and tangled: Gregoire de Fronsac (Samuel Le Bihan) and Mani (Mark Dacascos) are dispatched by the King of France to solve the mystery of a "beast" that has been attacking the populace of a small village, Gevaudan, and undermining his divine rule. They discover there's more than an elusive beast that's the source of the King's problems.
At first, when the beast is shown to us only in terms of the grotesque violence it afflicts, the movie plays as a suspense thriller. Half-way through the movie, the true nature of the beast is slightly revealed to us, pointing to a conspiracy which telegraphs what's going to happen. As the movie progresses, it is not clear who is friend or foe, and for the most part, it looks as though de Fronsac and Mani are on their own.
A few scenes in the film (particularly ones that take place indoors) are testament to the fact this is a French film. The set design and visual effects are extremely good, and fight sequences are well-choreographed. The film is apparently based on a true story where a beast (apparently a wolf) terrorised and killed villagers in Gevaudan in 1764. As such, the film offers an explanation for what was really happening. The Brotherhood of the Wolf is a highly entertaining film that's worth watching on the big screen, particularly if you don't take it too seriously.