Diamonds are pouring out through the Iron Curtain, but somebody talked - your entire spy ring is either dead or disavowed. Everything ties back to what happened a decade prior in Africa, and you have to find out where it ends. The mission isn't over.
A mission gone wrong, an agent left behind in enemy territory, the planned escape route compromised. This was supposed to be an easy mission to find out who's smuggling Soviet diamonds out of Crimea, but now you are right in the middle of a far larger mission. Somebody talked, your entire spy ring is either dead or disavowed: anyone could be the leak and you've been burned.
You must get to the truth, avoid your former allies, deal with new enemies, and compromise with known neutral parties in order to set things right. Everything ties back to what happened a decade prior in Africa, you have to pull on those strings and find out where it ends.