The game takes place inside John Tanner's mind, which has been left in coma after the events of Driv3r. Tanner is trying to hunt down crimelord and longtime rival Charles Jericho, albeit Tanner doesn't know that he's in coma.
PC System Analysis For Driver: San Francisco Requirements
Driver: San Francisco requires a Radeon HD 3850 graphics card with a Core 2 Quad Q6600 2.4GHz or Athlon II X4 620 processor to reach the recommended specs, achieving high graphics setting on 1080p. Minimum RAM requirements are 1 GB system memory. You will require a DirectX 9 GPU. To summarise, Driver: San Francisco needs around a 9 year old PC to play at recommended settings.