The only thing I remember about the plot is the elemental crystals or whatever being taken away causing the elements of wind, water, earth and fire to disappear from the world. So I guess you can claim it's weak because it's kind of rehashing the first game's plot, minus the fire bit, and that when compared to how big the stories of IV and VI were, yeah. But by itself I'm not convinced. And I thought the characters were a highlight of the game and is what kept me playing most of all.