When a cruise ship docked in Miami is the scene of a double homicide, the team must find the killer. The CSIs find that the long list of suspects includes a victim's wife who he met and married just seven days prior, her daughter, the ship's magician and the corrupt captain. However, the suspect list is narrowed down when the team discovers that a large sum of money was stolen from the safe in a victim's stateroom. Meanwhile, Horatio takes his relationship with Marisol to the next level.