Nelly and her dog London are about to spend autumn break with her uncle Hannibal. Soon she noticed that he doesn’t live a quiet life. Her uncle is a Monster agent. Nelly gets dragged in to an adventure filled with ghosts, vampires and werewolves.

During a snowy Christmas season in Sweden, psychologist and profiler Inger Johanne Vik finds not only herself but also her autistic daughter drawn into the investigation of a number of disturbing deaths, through which she meets detective Ingvar Nyman of “Rikskrim,” a Swedish national police force.