Paula and La Maestra are sixteen and inseparable. They train together over the summer to represent Mexico at the Junior Pan American Swimming Championship and are the strongest swimmers on their team. One night, at a party, Paula ends up alone with Daniel, a good friend and her longtime crush. Soon after, La Maestra senses that something has changed. Paula seems distant and deeply sad. As the two girls respond in different ways, their bond is put to the test. Fear, guilt, and anger begin to fracture their friendship, pushing them toward a decision that will redefine who they are.