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Joseph Gordon-Levitt is a time-traveling hit man tasked with taking out the older version of himself (played by Bruce Willis) in the futuristic thriller Looper. Watch the brand-new trailer!

Video: Joseph Gordon-Levitt's Trippy Time Travel Thriller

In Looper, time travel exists in the future -- but it will be illegal and only available on the black market. When the mob wants to get rid of someone, they send their target 30 years into the past, where a "looper" -- a hired gun, like Joe (Gordon-Levitt) -- is waiting to mop up. Joe lives the good life with his job as a looper – until one day the mob decides to "close the loop," sending back Joe's future self (Willis) for assassination. Will he kill himself, or team up to get revenge?

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Written and directed by Rian Johnson, Looper also stars Emily Blunt, Paul Dano and Jeff Daniels. The movie time travels into theaters September 28.