Hoping to put to rest years of unease concerning a past case, retired criminal investigator Benjamín begins writing a novel based on the unsolved mystery of a newlywed’s rape and murder. With the help of a former colleague, judge Irene, he attempts to make sense of the past.

Imagination and the World of Fantasy are in danger. Mar, an eight-year-old little girl, who's an expert in stories and legends thanks to the books read to her every night by her grandfather, decides she has to try and save them. With the help of her friends, the Lunnis, they will embark on a magical adventure to stop them disappearing.