Tiago dreams recurringly with the death of Mariana, on December 23, 2013. At his side always appears a mysterious character, which Tiago recognizes from somehwere but can not identify. In the Ministry of Time another anachronism is discovered. In the poster of the famous film "O Pai Tirano" by António Lopes Ribeiro, a tablet of 2016 appears. Salvador sends the patrol to the studios of Tóbis during the shooting of the film (1940), to discover how the tablet appeared in the poster. And to eliminate this anachronism. It is also in this year that various information about their lives is apprehended by Tiago and Amélia: Tiago discovers who is the mysterious figure in his dreams and Amélia knows a relative of his future. Mafalda is once again on the path of patrol, and this time she is willing to reveal many secrets about the Ministério do Tempo. Tiago can not stop thinking about Mariana's death. He travels to 2013 determined to change the past. Amélia goes after him. Not to stop him, but to help him. The two arrive on December 23, 2013 only minutes from the fatal accident. They run to save Mariana. That's all Tiago wants. But not only he doesn't achieve it, but he will discover the most terrible of truths. And in the worst way.