Who Are You Mr. K? 2009 one on netflix

After many years spent in a Hong Kong prison, the old man returns to his homeland. Did he think that, thanks to a random fellow traveler – a nice guy Igor – he would be drawn into a dangerous intrigue. Now, in order to survive himself and save Igor, he must unravel this ingenious tangle, balancing “on the razor’s edge” to force criminals to get entangled in their own networks.