以维多利亚时代的伦敦为背景,讲述了一群陷入困境的街头少年被人操纵,为阴险的华生医生及其神秘的商业伙伴(难以捉摸的夏洛克·福尔摩斯)破案的故事。犯罪活动逐渐呈现出令人恐惧的超自然背景,并且出现了一股黑暗势力,这支非正规侦缉小队的成员必须团结起来,一起拯救伦敦和整个世界。Set in Victorian London, the series follows a gang of troubled street teens who are manipulated into solving crimes for the sinister Doctor Watson and his mysterious business partner, the elusive Sherlock Holmes.