Roman wants to learn some stuff about Niko's past, but Niko isn't willing to share that info just yet. Roman wants to go on another taxi-mission and pick up his friend Little Jacob from near the park.
Grab a vehicle and make your way to Little Jacob. After meeting him, Jacob will (apparently) tell you where he wants to go, so make your way to Shetlar. He will give you a pistol as you drive along, and will tell you he may need your backup if anything goes wrong.
Once you arrive in the alley way, make your way up the stairs and crouch down at the top next to the broken wall. A number of guys will attempt to ambush Jacob, so aim at them and take the three of them out. Another guy will appear on the roof, so shoot him a few times until he's dead too.
Little Jacob will give you his phone number once everything's settled down and offers you some work.
Drive him to the cafe he mentions, then listen to the phone call with Roman.
- After all of the enemies are dead, grab their orange glowing weapons. There's not many chances to pick up this much ammo for free, so make sure you collect them all before you leave.
- Use manual aim by holding in the aim button lightly and go for headshots. A bullet in the brain will stop any enemy in one shot.
- After the mission, Little Jacob will become a contact on your cell phone.