The first half of Pavel Khvaleev's latest film echoes Saw and Martyrs, it ends up being something entirely different. Saying more would spoil the fun, just make sure you don't go in with the wrong expectations. The first half is solid genre fun, though not quite up to the standard of Khvaleev's previous work. The second half is completely bonkers and elevates the film well beyond standard genre fare. A dark, diabolic and unrelenting descent into madness, well recommended for those who like their horror films a little different.