Mystery of the province of Nampula

The story takes place in the 80s on the African continent. Two friends of youth: Yuri Spirin and Mikhail Chernykh, after graduating from the Moscow Institute of the Ministry of Defense, are employed by military translators in Angola. After some time, fate scatters friends on opposite sides of the barricades. Mikhail Chernykh becomes Michael Blekman and works as a CIA agent, and Yuri Spirin becomes a KGB officer. At the beginning of the 1980s, the government of the USSR closely cooperated with the government of the liberation movement of Mozambique, pursuing its interests in this country. Spirin is sent on a special trip to oversee geological prospecting in the Mozambican province of Nakala. Pursuing their interests, the US government sends a special squad headed by Michael Blekman to Mozambique to take hostages from USSR geologists ..