In John Sinclair's line of work, the lines are blurred between supernatural cults and organised crime: both lead to extensive violence and upset the peace. When the two combine into a force threatening to upheave London's underworld, Sinclair has to team up with a new partner to prevent the Black Dragon from rising in more ways than one. The aftermath brings equally little peace, as Sinclair's new fling finds herself targeted by dark forces as well. Can he save her without betraying all he holds dear?