The Repentant Rake

When Sir Julius Cheever's son, a notorious rake, goes missing, and a blackmailer begins terrorising London's most dissolute fops, it seems plausible that the two events are connected. Divided by politics but united in a desire to see justice done, Christopher Redmayne and Jonathan Bale must combine forces once again.
But how can they hope to find those who exploit the scandal of others, when the victims themselves will do anything to maintain their anonymity? And what of Sir Julius's son? Most feel he must have been the victim of his own, debauched appetites, but a few talk of his repentance. So where is the repentant rake? And, with only lies, rumours and gossip to work with, can Redmayne and Bale ever hope to find him?