There's an unrelenting grimness about this zombie story. After a while, as much as you are drawn to the central characters, I find myself willing them simply to end it all, so desperate is their situation, so desperately unhappy are any of their options in this new, icy world.
But Marco and Sonia (Francis Renaud and Hélène de Fougerolles) are made of sterner stuff than I am. Also, to add to their complications, they are expecting a child. As the sombreness is piled on, the unforgiving punishments these characters - and others - endure, 'Mutants' is in danger of becoming very one-note, with no let up in misery.
As the publicity maintains, 'Extinction is just a heartbeat away'. And all because of human greed. An enjoyable low-key tale of gore and desperation, of betrayal and false hope. Sombre indeed. My score is 7 out of 10.