The Story All Over Again

This is a prequel to Lufia I rather than a sequel unlike the title tends to make you think. It's about the very first Sinistral attack where you play as Maxim, Guy, Selan, and Artea to defeat the sinistrals for the first time. But there is one thing that I do not understand, don't we all know what happens in the end if we all played Lufia I?