While You Dream, Angels Gleam

"e;While You Dream, Angels Gleam"e; is a poetic, fictional book about angels sitting on stars and watching over little children while they sleep, to take away any bad dreams they may be having. It also opens up a hidden door in the skies, where magical creatures (a zebra that flies, a Pegasus, a dragon that breathes glitter, instead of fire, etc) exist. There is a twist at the end, the two sisters have a mission to accomplish. Let's find out together what the twist is, what is the mission that they need to accomplish?