John Wick (2014) - An ex-hitman comes out of retirement to track down the gangsters that took everything from him. 
 
http://www.imdb.com/title/tt2911666/?ref_=fn_al_tt_1


John Wick: Chapter 2 (2017) - After returning to the criminal underworld to repay a debt, John Wick discovers that a large bounty has been put on his life.
 
http://www.imdb.com/title/tt4425200/?ref_=nv_sr_1