[Revised] A manipulative cat uses trickery and the dark arts to exact revenge upon an unappreciative mother, disrupting her big presentation.

Everyone above has made great points so I'll help you out with a quick rewrite to get you on your way:

When her mother turns her into a cat as a punishment, a supernatural girl tries to exact revenge on her while adapting to her new body.?

Hope this helps.?

Everyone above has made great points so I'll help you out with a quick rewrite to get you on your way:

When her mother turns her into a cat as a punishment, a supernatural girl tries to exact revenge on her while adapting to her new body.?

Hope this helps.?

Agreed with DPG and Richiev.
Also without any background knowledge of the concept a reader may not get what you mean when describing the cat as; wanting to exact revenge on a human mother. If the cat is the daughter incarnate, then it needs to be in the logline otherwise the concept parts with reality and confuses the unsuspecting reader.