The unsolved case of two girls who disappeared from the Pyrenee town of Monteperdido five years ago is reopened when one of them reappears.

Marcos (Roberto Álamo) is a firefighter who, in spite of being used to extreme situations, goes into shock when life deals him a bad hand. His new inability to empathize with others affects both his personal and professional life. He seeks the help of a psychologist, Luna (Manuela Vellés), who with his daughter Lola (Claudia Placer) helps him rebuild his life.