Dirge of Cerberus is set three years after the original FFVII game (and one year after the events in Advent Children), and the plot revolves around a group of Deepground Soldiers who emerge from their underground lair--in which they were apparently buried after the meteor events at the end of FFVII--and begin terrorizing Midgar. Vincent Valentine, the enigmatic character from the previous game, is somehow connected to these attacks, and he'll be the character you take control of as you investigate the attacks and attempt to get to the root of the mystery surrounding the appearance of the Deepground Soldiers. The only other character from FFVII that's known to appear in the game is Cait Sith, although we wouldn't be surprised to see a few other familiar faces when the game comes out.