During a severe drought, Judith (15) roams the valleys of San Marcelo searching for water. She possesses a mysterious ability to detect underground flows. Using this gift, she helps her father, Óscar (50), distribute water throughout the town in their tanker truck. One day, a strange force draws her to an old dry well, where she senses a presence buried below. As Judith investigates, she becomes aware of a local network organised to hoard water resources for the benefit of a powerful avocado plantation.

Determined to understand the connection between her uncanny perception of the underground world and the growing tension caused by water scarcity in the community, she secretly begins helping local residents find water on their own land — something her father and godfather strongly disapprove of. During this process, she forms a close bond with Dylan (16), who asks for her help to find water for his family. Judith soon finds herself at the centre of a social, familial, and moral conflict. Despite her family’s concerns, she is determined to uncover what lies behind the mysterious force and the town’s worsening drought.