The film opens with a kid named Finn playing video games in his house while his parents leave. Strange events occur when they are gone: knives move, doors unlock, and Finn finds his sister, Anna, in distress. Finn resists Anna's demands, leading to a tragic accident at a dam. Finn's parents discover the situation, and Finn struggles with the aftermath, seeking help for his trauma-induced brain damage. Despite his doctor's skepticism, Finn experiences hallucinations at a party and later helps a sick grandparent in the hospital. Reflecting at the dam, Finn contemplates the events that have unfolded.