When the TARDIS malfunctions, it and its travellers land on Earth at the size of insects. They uncover a murderous plot involving a new insecticide, but how can they stop the crime in their miniaturised condition?
A woman is found murdered in a house along the coast from Brighton. Local detectives Fellows and Wilks lead an investigation methodically following up leads and clues mostly in Brighton and Hove but also further afield.
As Vic Brown vacillates between infatuation and disinterest for his co-worker Ingrid Rothwell, she finds out that she is pregnant and Vic has to reconcile how he thought his life would go with what life actually has in store for him.