When a university student returns native sacred objects to a rural town he awakens an old Celtic curse. He must confront the curse to save the town and himself.
I like your story idea, but I think you can up the stakes a bit. How about making it his hometown – the lives of his loved ones and friends are at stake. And how about an adjective to tell us a bit more about him. Is he shy, average, brilliant, the town’s returning football hero, or something else? Although I don’t think it’s a crime on occasion to have a two sentence logline, it’s not necessary here. As an example of what I mean, how about this:
‘When a naïve but clever university student locates and then returns sacred native objects to his small hometown, thus inadvertently awakening an old Celtic curse, he must unravel the mystery of the curse to save his loved ones, the townsfolk and himself.’
But presumably he doesn’t know that the objects will awaken the curse – that’s why I used the word ‘inadvertently’. I was attempting to make it clear that he was trying to do his hometown a favour by finding the objects and then returning them. Otherwise, it might seem that he took/stole them from the town and is now returning what he took. Of course, my take on this could be wrong.