After a mysterious attack claims the lives of her parents, all Estela has left is her determination to solve the case. Suffering from survivor’s guilt so intense that she might be losing her grip on reality, she accepts an invitation to live overseas with an estranged aunt at their ancestral Spanish castle, la Sombra.

Beneath its gothic façade, la Sombra harbors a trove of family secrets, and Estela begins to suspect her parents’ deaths may be linked to their past. Her investigation takes a supernatural turn when she crosses paths with a silver-eyed boy only she can see. Estela worries Sebastián is a hallucination, but he claims he’s been trapped in the castle. They grudgingly team up to find answers and as their investigation ignites, so does a romance, mistrust twined with every caress.

As the mysteries pile up, it feels to Estela like everyone in the tiny town of Oscuro is lying and that whoever was behind the attack has followed her to Spain. The deeper she ventures into la Sombra’s secrets, the more certain she becomes that the suspect she’s chasing has already found her . . . and they’re closer than she ever realized.