Carmen, a woman haunted by family tragedy, drives at night after a long day of work. To fight sleep, she decides to stop in a gas station to rest. There, she meets a shadow of her past who could explain her present.
Musa goes to the Registry Office to verify his identity, but discovers that there is no trace of him in the system: he does not exist. This raises suspicions among the officials and they convince Musa to plunge into a Kafkaesque process where he will have to go to a judge.
After the discovery of some human bones at a site, Adela and Javier, a couple of archaeologists with years of experience, have to live with the first signs of Javier's dementia and a new discovery, which like an echo, seems to resonate more and more in their daily life.
