The game handles the 2 months of fighting during February until April 1944 in and around the city of Narva. Stalin just launched his spring offensive and had got the germans on the run. The 3 SS Panzer Corps takes a stand on the city of Narva against 3 armies from the Leningrad Front. The Soviet troops constantly being reinforced sends wave after wave of attacking divisions against the slowly increasing German defenders. Estonia stamps a division out of the ground after Hitler promising them some kind of independence. This unit, being formed into the 20th SS fights not only a war of liberation but also a civil one since Stalin sends for the 8th Corps to attack them. That corps being formed from Estonians fighting Hitler.
Army Group Narwa is built around the same system of rules that have shaped both Plan West and Königsberg'45. The game uses a chit pull system. Each turn is one week and the standard game has 12 turns.