Heart follows the story of Stacey Monners as she processes the grief of losing her lifelong friend in her freshman year of college. Little known to her, the death of her friend was planned in an effort to squelch the growth of a strange ability she discovered she had the year before: botanokinesis. Through a flip-flop conflict of FBI intervention and campus defence of her friend, Stacey comes to a place at the end near where she began, but with a few new friends to show for it.