A woman who survived a concentration camp as a girl seeks murderous revenge on Nazis, but those who have been watching her have other plans.

Isabel and Lucena must cozy up to Otto and his wife as the team works to put their plan in motion ahead of Heim's arrival.

Just as Lucena seems to gain Bachmann's trust, the situation takes a challenging and dangerous turn; Marsé opens up to Isabel about his past.

The crew travels to Almería in an attempt to track down Otto and Ilse so that they can capture Heim; Castro reveals a personal secret.

While Isabel holds Heim captive, he antagonizes her with stories of torture he inflicted; she reflects on recent memories she made with her new friends.