Magnus and Will both have their reasons for tracking down a young boy who disappeared after behaving strangely at the scene of a murder.

Will is drawn further into Magnus's mysterious world and finds himself confronting his oldest fear; Magnus must confront her own past and consider a dangerous deal with the sinister Druitt.

Dr Magnus, Ashley and Will rescue three women from a mysterious crypt in Scotland, but their disappearance does not go undetected by a powerful cabal determined to reclaim what they believe is theirs.

An investigation into a bizarre robbery in which the thieves disappeared without trace reminds Will of a case he worked on with the FBI but could never solve.

Magnus, Will and their colleague Allison Grant are stranded when their plane goes down in a desolate mountain range. While anxiously waiting for a rescue team, the passengers fall victim to a series of deadly attacks and vivid nightmares.

When a pair of cute, furry Abnormals discovered in the hold of a bioresearch vessel are brought in to be studied, the team starts to exhibit a strange animal attraction for each other.