Sara, a journalist fallen out of favor for accepting a bribe from a local mobster, is broke and helpless. She rents a cheap old flat in a run-down building on the outskirts of town inhabited by some strange and elusive neighbours: Simon, the sinister maintenance manager at a foster home center; Olvido, a drug addict who spends her days in a cloud of meth and Alex, an unemployed youngster who lives surrounded by wealth and luxury. Right after moving in, Sara begins to suspect that she is not alone in the flat. There is someone else there, lurking in the shadows at the end of the corridor. Following a series of strange and creepy events, Sara discovers the identity of the ghost, that can only be seen reflected in mirrors. It belongs to an old lady, María, the previous tenant of the flat. Sara gets over her initial shock and realizes the true intentions of the old lady: to reveal the identity of the murderers and, above all, to expose their motive to comit such a crime. “Wolves and Lambs... Wolves and Lambs...” The cracks on the facade are the result of something that’s going on underneath the building and Sara follows a series of clues that connect the residents of the building with Cortes Vidal, a rich bussinessman and a philanthropist who has just announced he will be running for mayor. He is also the sponsor of “The Good Shepherd”, the foster home center across the street. Sara comes to the conclussion that the residents are involved in the death of the old lady, who was about to expose what was going on in the basement of the building. Sara is offered to be a part of the conspiracy. She will be given a huge amount of money in exchange for her silence, for looking the other way. She refuses it, putting her life in danger and discovering the motive behind the murder: a well-organized child abuse plot led by Cortes Vidal, who used the foster care center as his own playground, covered up by the neighbours, who were on his payroll. The ordeal is over and Sara gets a second chance as she returns to her former job at the paper. She has a story to tell now and her comeback article has a title that encapsulates all the human misery she has recently seen: “Cracks”.