Flash follows a young girl with a vivid imagination through a bizarre evening. Her reality is enmeshed with vast, animated fantasies, and on this night, her usual bike ride homeward is interrupted by suspicious and enticing events. Her sense of curiosity and imagination collide with reailty, bringing forth vandals and mystery figures in the light of the moon. The events that unfold in her city force her to face strange desires, extant deep in her psyche.