Karas Life before

Karas pops(Raine) has Been missing for 12 years and she and her dad (Grimm) have lost all hope but just before term starts she is spun back and for her fourth year she spends it in the past as Artemis -Her animagus form- professor oaks 'pet'
the only one who knows about her predicament is Oak. But that year is the year raine is to go missing. will being back in time help kara find who took her dad and where he is?