It's anchored by two fantastic performances. Seeing these two men go head-to-head psychologically and physically is enthralling.

There's no shortage of Korean revenge-thrillers, but this, along with the recent The Man from Nowhere, proves there is plenty of life left in the genre.

A remorseless catalogue of calculated violence, casual cannibalism and sexual sadism, this inflicts over two hours of suffering on the audience...

It’s deceptively simple, but is actually an impressive balancing act of being disturbing, thrilling, funny, and ultimately satisfying.