Hotel Caledonia

In "Hotel Caledonia," the seventh installment of the Black Ocean: Mercy for Hire series, Esper finds herself in a tense underwater mystery after attending a covert meeting on an exclusive submarine hotel. When she arrives at her contact's location, she witnesses his murder, only for the cruise ship to then be sunk, trapping her and the other passengers with the killer. As she races against time to uncover the murderer and retrieve stolen intel, Esper must navigate a dangerous situation while ensuring everyone's safety, all within the lush confines of a luxury liner.