Critically-acclaimed filmmakers Joel Coen and Ethan Coen make their return to the big screen with Inside Llewyn Davis, arriving in theaters December 6. CBS Films has released the fourth trailer for this upcoming musical drama, starring Oscar Isaac as downtrodden folk singer Llewyn Davis, who is trying to find a way to survive in Greenwich Village. Carey Mulligan, Justin Timberlake, Garrett Hedlund and John Goodman are also featured in the latest footage for this potential Oscar contender, which has been receiving rave reviews during its festival circuit run.

Inside Llewyn Davis follows a week in the life of a young folk singer as he navigates the Greenwich Village folk scene of 1961.

Llewyn Davis (Oscar Isaac) is at a crossroads. Guitar in tow, huddled against the unforgiving New York winter, he is struggling to make it as a musician against seemingly insurmountable obstacles-some of them of his own making. Living at the mercy of both friends and strangers, scaring up what work he can find, Llewyn's misadventures take him from the baskethouses of the Village to an empty Chicago club-on an odyssey to audition for a music mogul -and back again.

Brimming with music performed by Isaac, Justin Timberlake and Carey Mulligan (as Llewyn's married Village friends), as well as Marcus Mumford and Punch Brothers, Inside Llewyn Davis - in the tradition of O Brother, Where Art Thou? - is infused with the transportive sound of another time and place. An epic on an intimate scale, it represents the Coen Brothers' fourth collaboration with multiple-Grammy and Academy Award-winning music producer T-Bone Burnett. Marcus Mumford is associate music producer.