The girls embark on a cruise vacation away from Rosewood, but trouble follows and new secrets are formed as Emily gets friendly with a stowaway, Aria goes treasure-hunting, Spencer goes overboard for a crush, and Hanna is reunited with someone from the past.

In 1889, the ship Etruria departs Liverpool, England, for New York carrying Audrey Rose Wadsworth and her crime-solving partner, Thomas, a famous escape artist, and a cold-blooded killer.-- 1889. Audrey Rose Wadsworth and Thomas Cresswell, are en route to New York on the opulent RMS Etruria. When young women begin to go missing, a series of brutal slayings shocks the entire ship. As Audrey Rose and Thomas begin to piece together the gruesome investigation,...