A deftly crafted, scintillating mash-up of Victorian mystery and horror - Sherlock Holmes and Mr Hyde encounter villains with unfathomable, terrifying abilities?

A new client arrives at Baker Street seeking Sherlock Holmes's help: Dr Jekyll claims his friend, Mr Edward Hyde, has been wrongfully accused of the hideous murders unfolding across London. But the case becomes more complicated, more unsettling than simply proving Mr Hyde's innocence - for Holmes and Watson unearth beastly transformations, a killer who moves unseen, a secret organisation and then find a traitor in their midst....