The idea in two sentences

Exploring an old creepy attic our hero Lucy accidentally sets a two year curse on herself by playing with an accent and mythical music box. We see her undergo a series of Halloween-inspired moments to show the true agony of being stuck in something, utterly dreadful for two years. 

Like a contract, Lucy is trapped. She’s no longer in control. She was caught by the fascinating music box and unwittingly, got herself deeper than she wanted, signing her life away.