With the gallant Captain Knight at her side, River faces the Great Intelligence and its Yeti army. But her biggest challenge may be keeping time itself on track.
Miniscope parts fetch quite a price on the open market - luckily, River knows where she can find one that's about to be decommissioned. Unfortunately, this particular miniscope is chock-full of aliens, as well as unsuspecting Earthlings.
River visits Victorian London. But when young women are stolen from the streets, she takes a stand. River's investigation leads to theatre impresario Henry Gordon Jago, and his latest star act: Li H'Sen Chang and the unnerving Mr Sin.