the charmed ones are hiding in the underworld because billie and christy ruined their reputations.
the charmed ones and billie and christy decide to use potions to kill each other but that doesnt work.
demons are at phoebes apartment waiting for her and her sisters to come. they arrive but the demons put them to sleep and wait for them to wake up.
when they do wake up the demons tell them that the triad are the ones who are planning everything.piper sees leo and decides to help the demons.
both sets of sisters come to the conclusion that they must use the hollow to destroy ecah other.
billie and christy take wyatt so that they can get the hollow and steal his powers.
the charmed ones (infested with the hollow) go to kill the triad and then they go to fight billie and christy.
the ultimate battle begins and giant beams shoot of of everyones hands.
piper wakes up and finds phoebe dead. hears paige crying but it turns out to be billie.the angel of destiny returns leo and piper starts punching billie and trying to blow her up but leo tells her to stop and that there isnt anything here fot them anymore.
the episode ends with a TO BE CONTINUED.
this is 1 of the best episodes of charmed.