Black MassWho's worse: a violent, cutthroat gangster — or the law enforcement that lets him get away with murder?

That's the set-up of the new trailer for "Black Mass," the movie about notorious crime boss Whitey Bulger (Johnny Depp). The first teaser was all about Depp — gunning down people, menacing others, and generally being a badass gangster.

This one gives us more of the plot: Whitey rises to power in South Boston, thanks to friends in the right places — including his brother, Billy (Benedict Cumberbatch), who's a star politician. His biggest ally is FBI Agent John Connelly (Joel Edgerton), who looks the other way on Whitey's criminal activities.

Watch the trailer.

"How come no one has nailed Whitey Bulger?" wonders Assistant U.S. Attorney Fred Wyshak (Corey Stoll). When Connelly brushes him off, asking what Bulger has done, an incredulous Wyshak replies, "Everything!"

This new trailer shows us more of the other, non-Depp players in "Black Mass," and they all look good, from Cumberbatch and Stoll to Jesse Plemons and Dakota Johnson. But this is Depp's movie, and as in the first teaser, he looks incredible. He's unrecognizable, which is a very good thing. Depp's become a caricature of himself in recent year, and this could be the performance to bring him back into critical acclaim and awards contention.

"Black Mass" opens in theaters September 18.

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