After a remote diamond mine collapses in far northern Canada, a 'big-rig' ice road driver must lead an impossible rescue mission over a frozen lake to save the trapped miners.After a remote diamond mine collapses in far northern Canada, a 'big-rig' ice road driver must lead an impossible rescue mission over a frozen lake to save the trapped miners.After a remote diamond mine collapses in far northern Canada, a 'big-rig' ice road driver must lead an impossible rescue mission over a frozen lake to save the trapped miners.