Carl and Sweet Johnson have managed to find out where former friend, Big Smoke is hiding. They drive over to Smoke's hideout in East Los Santos avoiding rioters. Upon arriving, they see that Smoke's crack palace has heavy security and there's no way to enter the place except for breaking through the wall. Carl finds a SWAT Tank nearby and steals it while being attacked by SWAT officers and Ballas gang members. He successfully smashes the wall and enters the crack palace.
Upon entering, Carl makes his way through three floors while killing Ballas, Vagos, San Fierro Rifa, and Russian Mafia gang members as well as workers, whom all carry M4, AK-47 and MP5s amongst other strong weapons. Carl manages to find Big Smoke, who claims that he doesn't feel any regrets over betraying the Grove Street Families and takes out a gun ready to battle Carl. During a shoot-out, Carl manages to kill Smoke and after a brief conversation questioning Smoke's decision, he says he had no choice and saw the opportunity for power and money before dying.
Frank Tenpenny, who had been watching the whole thing, arrives and asks Carl to put all of Smoke's money in his bag. Tenpenny threatens Carl with a shotgun, but Carl distracts him by shouting "Sweet!" which makes Tenpenny think that Sweet is hiding somewhere. After he notices that he got fooled, he tries to shoot Carl, but misses. After that, Tenpenny runs to the second floor and sets the whole building on fire by shooting a generator and causing it to explode.. Carl goes the same way out and kills any gang member on his way while avoiding burning himself by the fires around the building.
After successfully escaping, Tenpenny attempts to drive away in his Firetruck, Sweet jumps on his Greenwood and then leaps at the ladder on the back of the truck, and hangs on from the ladder. Carl enters a parked Feltzer and starts to chase Tenpenny. During a long chase throughout Los Santos with rioters on the road throwing molotovs and police chasing the trio, a police officer in the truck gets out and starts stamping on Sweet's fingers. Carl gets the Feltzer under the ladder and Sweet drops onto the hood and then climbs over into the passenger seat.
Sweet then takes control of the car with Carl acting as the shooter with his Micro SMG. The chase continues throughout the city with Carl destroying Police Cars as well as rioters chasing them in cars and bikes. The chase comes to an end on the bridge going above Ganton where Tenpenny crashes his truck and after the injuries dies at the heart of Grove Street territory.
Carl, Sweet, The Truth, Kendl, Cesar together start a conversation as Tenpenny says his last words and they head inside the Johnson House to talk about their future. Suddenly, Ken Rosenberg, Madd Dogg, Kent Paul and Maccer enter the house with everybody inside drawing their guns towards them. Madd Dogg announces his first gold record and they all celebrate their success before Carl heads out of the house "fittin' to hit the block, see what's happening". Following the end, Catalina calls for the last time and is heard having sex with her boyfriend Claude.
If you're referring to what you get, then it's the prize of 250,000$ + Respect. Hope this helps.