In a lonely area Cecile is the victim of an attack which Sardou believes may have been carried out by a serial killer he is trying to trace. Shortly afterwards a beachcomber stumbles on the body of a further victim and sees a man running away; Cecile, however, is unable to pick him out of an identity parade and the man denies attacking her.

Trying to track down Cecile's attacker Trevor borrows astrological software from a business rival of Gladys's, and although Sardou is scornful at first it emerges that Trevor has produced some useful information enabling Eavis to tie the attacks in France with a further one in England. Cecile returns to Folkestone with the Moons, ostensibly to forget about her experience. However when Gladys helps her to focus on a minor detail about the man – he had half of one finger missing – it puts Sardou on the trail of a previous suspect, who is currently stalking Cecile in England.

Although the man succeeds in luring her to an isolated spot, Trevor arrive