The last dark one

Heaven and Hell has been seperated by a barrier for eighteen years now. Everyone belives that the incident that happened before the barrier was made was nothing more than that. Everyone thinks the things that happened so long ago have been forgotten or forgiven. That heaven and hell can live in peace now that the barrier is separating the two realms. Everyone except a girl named Lazari who cant fit into any of the two realms. Will she find the reason why she is so different? Will she find out the truth about the incident? Can heaven and hell really live in peace?