1981 The war between the two superpowers comes to the outskirts of San Fierro. Several Soviet soldiers sabotage a secret US Army facility. The city is shrouded in a strange, caustic fog. The government is extending martial law, and people are expressing their dissatisfaction more radically. There is a leak in the government, everyone is now suspected of having links with the communists. Military detective Paul arrives in the city, his task is to investigate the leak of information, in the face of incredible restrictions and strong pressure from the outside.