Yin and Yang

One night when (boy twin) Ace falls asleep, he is met with 3 people in his dream. The one in front of the other two tells him that he and his sister are the chosen ones to break an ancient evil that has been let out. She tells him that he must not be selfish and not tell (girl twin) Ally about this because he can't face it himself.

He has always felt more special than Ally and wished they weren't born as twins. He decides to believe the dream, just to feel more important than Ally. On their way to school the next day, they are ambushed and meet the people in Ace's dream.

Ally is scared and confused and demands to know what's happening. The three people, Karla, Marvin, and Helios, all tell her that they are the chosen ones and must break an ancient evil. They say Ace was supposed to tell her and that they would have told her except he was the older twin and his magic was just a bit stronger.

Ace goes off and tells them that they don't need Ally and that she's just a screw-up and would likely let the evil go. He upsets Ally and she decides she wants to be called Hanah and says she will stay and help only when needed.

They leave town in Marvin's van and head to New York where it's said the evil lives.

When in battle with people who work for the person who let out the evil, after a month of searching, they lose Hanah, and Ace's magic grows weaker. Their magic is built from the love and closeness the twins share, but with one twin being away his magic is all out of whack.

He decides to use how his magic is stronger when Hanah is near to track down the person with the essence of the ancient evil and win back his sister before defeating him.

Once they are together and Hanah is Ally again, both of their magic is stronger than its ever been. They find out there is no way to destroy the evil and no way they know of to capture it but they know they can't let it free, so they decided to use their life force to make it good, and that's how they die.