Basically, from plot 1 to final:
Big giant underground demon absorbs/ dissolves 25 students in order to grow into a giant fiend. Rio got slashed and poisoned, then healed. Many students helped fight and got out relatively unscathed. Then a freaking swarm of demon dogs storm the beach and destroy the dorms, killing even more students and kidnapping Aurrea. Sky and Rio manage to destroy the alpha and now the entire island is covered in black tar. Rio falls incredibly ill after using nearly all of her power in one go, which as had been stated before will kill her. Sky is in the process of rounding up all the students into temporary shelter in the gym and the newly hired maid is very annoyed with all the cleaning up. Rio, in a desperate attempt to find Aurrea ventures down into the caves, only to be captured by Viiper, the master mind behind all the demons. He uses the tar to corrupt and turn Rio into a cackling fiend, who burrows through the earth and through the gym floor, frightening and minority injuring many students. Sealing away some of the more powerful children into pods, she throws them down the hole and kidnaps Aura's younger sister Sammy, before every basically follows Rio. There, they meet a zombie like Viiper, who stalls for quite some time and plays around with the students lies before growing impatient, and orders Rio to kill the students within the pods so he may absorb their remains to fully reanimate his corpse and restore his powers. Then, he sends demon Rio to kill the others, and she does quite a fair deal of damage until Aurrea interferes and drops the bomb that the demon was actually Rio. Rio is later knocked out of commission for a short while after taking a rather severe wound that would have killed Aurrea. Viiper then stalls the other characters by threatening them with Sammy, until Aurrea and Rio fuse together. Cue epic battle between Viiper and Rio, Viiper fully corrupting himself and Rio dying quickly as she is using all of her power. The fight is dragged outside, in which Rio, pretty much almost dead, urges everyone to take cover underground before turning herself into a living bomb and completely obliterating Viiper. She then sealed herself away into her heart within a few milliseconds and is now in a comatose like state within it. Everyone else is trying to cope with the trauma and Sky is trying to reanimate Rio.
lot of stuff and its only been a day.