Grand Theft Auto IV Walkthrough

Walk on in unarmed and speak with the host of the restaurant. When Niko asks about Kim, his Korean mark, the host tells Niko to go away. Ignore the left side of the restaurant—the right side of the restaurant, near the stairs leading up to the second floor is of prime interest. When you approach this area, however, the host will pull a pistol and begin firing on you. Do yourself a favor and kill him before he even pulls a gun. Naturally, either way (whether you shoot first or he does), all of his cohorts will know you're in the building as soon as the guns begin firing. So, work your way into the room with the staircase and begin firing at foes coming down the stairs. You should also attempt to thin out the enemies on the second floor before heading up there, which will make your life much, much easier once you go up there yourself.

You'll no doubt notice that the enemies here have plenty of cover to utilize, so you should use that same cover when you're being fired upon yourself. Make sure to pick of the varying weapons your enemies will drop when slain (such as Uzis and assault rifles), and work your way towards the turquoise dot on your HUD, which represents the restaurant's manager. When you bust into his office, hold a gun to him but don't fire... at least until the manager gives up Kim's location, which will show up on the HUD thereafter. Once he shows up, you'll need to work your way through the kitchen and out the back door, down some stairs (kill enemies en route if you desire). Kim will take off in a car, and you'll have to chase him and kill him. Even though there's a motorcycle nearby, you'll want to grab a car, since you can command the slow-moving car into a wall and shoot Kim to death before he gets very far. Once he's slain, the mission concludes.