Rose is actually pretty basic to explain. It's basically a new story after Rayfire (duh! It is a sequel). Anyway, what I mean in that if you've read the plot for Rayfire you'll be able to get this one easy peasy and I won't need to explain so much. So before you read on, go give it a read.
Rose is the story of Troy's daughter, Rose. She resents having a normal life and although she knows that it's selfish, she wants something different and action-packed to happen. But you should be careful what you wish for, because she draws the attention of Lord Magari.
Magari rules Hell, banished there forever when he attempted to steal the treasure of the Godess Kaiya, the Godess of War long before Time was created. He Himself is a total mystery to all, but not to Rose when he meets him. Magari loved her!
There was one slight drawback. Rose doesn't love Magari at all and she holds the key to His plan to take over the Empire. Plus, there's her friend Jay.
To get him out of the way, Magari sends him to the future, with no way back, yet he accidently sends Rose too! So while the two friends adapt to their new life, Magari is stuck for a solution and He appeals to an old 'comrade' to help Him, an evil soceress known to all as Viala. She manages to recover Rose and leave Jay, and so Magari's evil rampage can now reach full swing...