The story of Ceniza Negra is set in a small village in the Caribbean off the coast of Costa Rica. In this village, wedged between river and sea, live 11-year-old Selva, her grandfather Fergusson, her brother Cao and Helena, the grandfather’s girlfriend. As their small house is threatened by the waves, other events such as the departure of her brother and the illness of her grandfather upset Selva’s childhood. So she decides to do all she can to keep her family together.
(https://www.semainedelacritique.com/en/movie/ceniza-negra)