Well, actually i would mention that this is the first "shining" in french in an european version (and multilanguage to be more general). It's a side story of the shining force 1 and shining force CD. Again you need to fight against Dark Dragon. I suppose that chronologically it comes before shining force 3 : The final conflict on Game Gear which was the end of the whole dark dragon and zeon (shining force 2 on genesis) saga with the last appearance of Odd Eye and the birth of Mephisto son of dark sol, dark dragon and zeon (he has absorbed all of their powers).
For those of you who are interested shining wisdom on saturn is far better after the final conflict on game gear and shining force 2. You see in it Kazim and Sarah, former heroes (magician and sorceress) of shining force 2. and the last boss is a friend of odd eye who is supposed to be dead, so maybe, we will see what happened to him and mephisto in shining soul 2 or maybe it's already in shining soul 1. damn i need to play this game til the end after all. I maintain that animation and gameplay are awful however.
The other shining episode on saturn are the beginning of a new saga against the revival of the Hyudol (Vandal in english). No real link but i'm sure that sega wish to make a sequel o f this part of the saga on gamecube (the sequel originally intented for dreamcast was cancelled so i expect it will come on gamecube).