Elizabeth Black is the headmistress of a girls' school in 1830s Victorian London. She is also a well-respected author of stories written both for and about the upper-class ladies of Victorian society. But by night, she writes very different kinds of stories - the Penny Dreadfuls that are all the rage among the working-class men. Under the pseudonym Charles King, Elizabeth has written about dashing heroes fighting supernatural threats, intelligent detectives solving grisly murders, and dangerous outlaws romancing helpless women.

With her inquisitive mind, Charlotte Holmes has never felt comfortable with the demureness expected of the fairer sex in upper class society. But even she never thought that she would become a social pariah, an outcast fending for herself on the mean streets of London. When the city is struck by a trio of unexpected deaths and suspicion falls on her sister and her father, Charlotte is desperate to find the true culprits and clear the family name. She’ll have help from friends new and old—a kind-hearted widow, a police inspector, and a man who has long loved her.

London, 1885. Amelie Hampton is a hopeless romantic, which makes her the perfect columnist to answer lonely heart letters in The Marriage Gazette. When Amelie plays matchmaker with two anonymous lonely hearts, she also decides to secretly observe the couple’s blind date. To her surprise, the man who appears for the rendezvous is Harold Radcliffe - a grieving widower and a member of Amelie’s book club.

India Steele is desperate. Her father is dead, her fiancé took her inheritance, and no one will employ her, despite years working for her watchmaker father. Indeed, the other London watchmakers seem frightened of her. Alone, poor, and at the end of her tether, India takes employment with the only person who’ll accept her–an enigmatic and mysterious man from America. A man who possesses a strange watch that rejuvenates him when he’s ill.

Living in London's poorest slum, Mercy Wilkins has little hope of a better life. When she's offered an opportunity to join a bride ship sailing to British Columbia, she agrees. After witnessing so much painful heartache and loss in the slums, the bride ship is her only prospect to escape a bleak future, not only for herself but, she hopes, someday for her sister. Wealthy and titled Joseph Colville leaves home and takes to the sea - as ship's surgeon - in order to escape the pain of losing his family. When Mercy becomes his assistant, the two must fight against a forbidden love.