When his fiancée abruptly departs for Trinidad after hearing disturbing news, Mycroft Holmes and his best friend Cyrus Douglas follow and find themselves drawn in to a treacherous investigation.

It began as a problem in one of Holmes' beloved beehives, led to a murderous cult, and ended - or so they'd hoped - with a daring escape from a sacrificial altar. Instead, Mary Russell and her husband, Sherlock Holmes, have stirred the wrath and the limitless resources of those they've thwarted. Now they are separated and on the run, wanted by the police, and pursued across the Continent by a ruthless enemy with powerful connections. From hidden rooms...

"It's 1890 and the newly famous Sherlock Holmes faces his worst adversary to date - a diabolical villain bent on destroying some of London's most admired public figures in particularly gruesome ways. A further puzzle is that suicide closely attends each of the murders. As he tracks the killer through vast and seething London, Holmes finds himself battling both an envious Scotland Yard and a critical press as he follows a complex trail from performers...