A teenage girl learns she has the ability to visit the physical world in her dreams, and must work with other similar teens to protect this world.

If you can say it in one or two words, you should tell us what is threatening the world so we understand why it is so important for the lead to use her powers.

"A schoolgirl with the newfound power to affect the real world while in her dreams, must team with other newly empowered teens to protect the world..." (From Ghosts?) (From Zombies?) (From An evil maniac set on taking over the world?) Not sure what.