What's Upstairs?

After his boating accident, Arthur's parents leave him to recover with his strict Aunt Agathora in her broken-down house. The first night, Arthur awakes to his aunt's shouting and investigates. She catches him creeping up the stairs to check out the noise. While she lectures him, he observes her holding a human arm. Frightened, Arthur tries to run away, but fails. His Aunt punishes him with grueling yard work and making him wear ridiculous outfits. While picking in the raspberry patch, he meets a neighborhood girl, Sienna, who has been spying on Agathora's late-night activities. Together they dream up ways of sneaking upstairs to find out his Aunt's secret. But, first, they must outfox his Aunt, a silent neighbor Mr. Stelios and his scary cousin, Lester. As they gather more information, the reality becomes confusing and bizarre. Is his Aunt a criminal? Insane? What is she hiding and why? In their final attempts to reach upstairs, will they learn the truth or will his Aunt's secrets destroy them all?