A few years years have passed since the events of Grand Theft Auto IV. In an alternate ending, Niko and Roman Bellic leave Liberty City after Mallorie's death untimely death. Thankfully, they've landed themselves in Vice City; the City of Sin. In a series of audacious events, Roman is pulled back into debt, resulting in Niko putting his neck on the line in order to protect whatever he has left.
As the title says, it's an early variant of a story character.