Deux étrangers se retrouvent piégés sous terre lorsque la ville est attaquée par une menace monstrueuse. Gravement blessés et disposant de ressources limitées, ils doivent emprunter un tunnel sombre et étroit dans l’espoir de trouver une sortie.
In the working-class suburbs of Bilbao in the 1980s, a children's rhythmic gymnastics team is preparing to take part in a championship to be held in Berlin. As mothers are unable to accompany their daughters, the task falls to the fathers.
Gabi's search for her missing pregnant stepsister takes a chilling turn when her sister's body is found, and the baby is gone. Determined to find the child and get justice, Gabi risks everything to unravel the truth behind the tragedy.