Sister witches

Witches made their own world to hide from the vampires. There are sister witches that are in a family that protects a clear clean river with crystals in it and it's called crystal river. The vampires come back to the witch world and try to take crystals out of the river they don't get far before the sisters get the crystals back. The sisters get frozen in the river for 901 years. When the sisters are unfrozen they have no idea where they are. Will they find out where they are, will they find out why they were frozen, and will they find out why they were unfrozen. Are the sister witches prepared for what they're about to learn.