Yeong-hye and her husband are ordinary people. He is an office worker with moderate ambitions and mild manners; she is an uninspired but dutiful wife. The acceptable flatline of their marriage is interrupted when Yeong-hye, seeking a more 'plant-like' existence, decides to become a vegetarian, prompted by grotesque recurring nightmares. In South Korea, where vegetarianism is almost unheard-of and societal mores are strictly obeyed, Yeong-hye's decision is a shocking act of subversion.