Daughter of Darkness 3: Memory's Echo

Meli's gone. It's a fact that Riku is trying his best to accept, but certain people aren't making it so easy for him. What if they're right, though? What if she's really still out there somewhere...is finding her even possible? And if they do find her, will she be the same Meli they all know and love? And will they even find out before someone tries to take over the universe AGAIN?