Montembeault made 17 saves in a busy first period for the Habs netminder.
Back for the second, and the Golden Knights got on the board first once again. This time it was William Karlsson who grabbed a Jonathan Marchessault's pass off the rush and backhanded it in on the power play.
The Canadiens' own power play got going shortly thereafter, as Tyler Toffoli scored for the second time in as many games since returning from injury, this time with the man advantage. It also marked the Habs' fourth consecutive game with a goal on the power play.