A kid afraid of water watches his sister float alone and has to choose between terror and her. That moment, where safety stops mattering, is the whole show. It doesn't need spectacle or length to break you. One episode, one decision, one reason to understand why some people run into water anyway.

On the hottest day of summer vacation, George, a boy obsessed with cleanliness, is brought by his parents to a busy public swimming pool. Too frightened to go in, he stays seated at the edge of the water. Then he notices his little sister floating on her own. This one-episode drama ONA centers on a single anxious day at the pool.