After mystical criminals break a powerful witch out of prison, a wizard a part of a magic police force must lead her first mission to catch them.

You should make it personal

"When the witch who killed her family escapes from prison, a determined mage-hunter comes out of retirement to take down the bitch." (I know 'bitch' probably doesn't work)

They are not all the same type of supernatural. They're not all witches, or whatever. There's a group of about five, and one's a warlock(the brother to the witch), one a telekinetic, and some others.
The witch and warlock are pawns in someone else's game, the people behind the scenes are alluded to, acknowledged, but they don't come into focus at all. The witch and warlock have their own goal.
Still working on it though. I don't think I'm quite satisfied.

"Mystical" strikes me as kind of, well, "misty" -- vague. ?The term can cover a broad range of super-sized skills and powers. ?

Given that there is a glut of super-sized characters in films of this genre, what makes this crew stand out? ?Is ?there one super-sized skill or power in particular that unique defines the culprit, hence the nature of the threat, the challenge the protagonist faces?

What's at stake if the protagonist fails to capture them. ?Not just in terms of her own career: ?surely, the bad gal and guys are not just going to lie low, sips mai tai's while watching the sun set on a Caribbean beach.

What is the witch's own nefarious objective goal that the protagonist must thwart?