OK, so yes - this is a very slow burn a times with far too many establishing and shots of decaying urban industrialisation, but when the action does actually focus on the story it's not a bad crime drama at all. We start with an arm sticking out of a pile of coal. The cops arrive and "Zhang" (Fan Liao) is soon on the case. He can only identify the corpse, though, and unimpressed his bosses ensure that five years down the line he is reduced to working as a security guard with a penchant for the bottle too. What we now know, though, is that there were a series of such killings and they are now un...