The three Halliwell sisters know that they are simply descendents from a line of female witches. They all have quotation that means ability (stopping time, moving objects, seeing the future), and so they can also combine their abilities inside the "Power of Three" to fight demons, warlocks, and also of evils...
Hmm...so that's the story of the TV series Charmed.
It seems to have a very interesting plot.
Is it still running?