Iron Monk (2012)

Haunted by memories of his past that leave him unable to practice kung fu, an ex-Shaolin Monk lives quietly in London's Chinatown. When an impulsive young British shopkeeper comes to him for help, the Monk finds a friend, but is reluctantly drawn into conflict with a vicious Triad gang that rapidly spirals out of control leaving the Monk with a stark choice: face his past and fight... Or die."