Free fall is one of the 100+ missions in San Andreas. It is associated with three main characters. If you have played the game then you know that the San Andreas city is very big and the developers have divided it into many parts. Some of the main parts of city are Los Santos, Country-side, Las Ventura, Los Angeles and Angel Pine.
You play different challenges in the above parts. These three are central characters in the video game. Ken Rosenberg, Salvatore Leone and Carl Johnson are those three central characters.
Ken gives you a task named as 'The Meat business'. After completing this, you get a call from Ken. He invites you to Salvatore's place. Salvatore is one of the wealthy businessmen in GTA San Andreas. And Ken is a lawyer and he works for Leone.
So, if you want to attempt Free-fall then you have to finish 'Meat business'. After this, visit the Caligula Palace. Inside this palace, reach the Caligula Casino. And there you have to stand in a red cylindrical marker to start Free Fall mission of GTA San Andreas game.
You trigger a cut scene of Free Fall. And in that seen, you can see Salvatore punishment two men for committing some crime. Although he is a criminal, he does not spare any crime. He ties those two men upside down and he orders Ken to hit them.
Then a woman named as 'Maria' enters the room. Maria brings some eatables for Salvatore. He jokes with her and teases her. Then she leaves the room. After this, the protagonist of GTA San Andreas game enters. Carl refers himself as a 'straight killer'. Also, he tells Leone that he has worked with Leone's son Joey. And this alliance was in Liberty City.
Ken, who is sitting there, praises Carl and calls him a 'one man army'. The boss of Caligula casino listens to talks. And both ken and Carl impress the boss. The boss gives Johnson a task which is the aim of Freefall .
There is a gang named Corelli and that gang is a staunch opponent of Leone family. Corelli's are sending some killers to murder Leone. But Leone is more intelligent and he sends Carl to kill all those killers.
As the free-fall mission progresses, you have to kill all the enemies and then you have to fly a plane. After this, you have to land the plane on airport to finish free fall challenge of GTA San Andreas.