Watch Free Online HD Moviesjoy. Choi Se-dam's grandmother, Yoon Young-ja, wanted to write a novel titled A Woman Dancing on the Waves. She spent her life as a shaman, building the family up from nothing. But she never managed to write the novel and eventually forgot who the 'woman dancing on the waves' was. Making her grandmother, who is gradually losing her memory, the protagonist, Choi unfolds a strange and remarkable family history.