Ivan Sarnoff escapes an assassination attempt by the Russian mob, and is on the loose. Evidence also suggests that Delko's father was involved, while Yelina, working undercover, is asked to find Sarnoff and finish the job.
A man desperate for justice creates a hostage situation at the Miami/Dade Police Department, and Horatio looks into his claims. One of the hostages is Jesse Cardoza, a former CSI who is returning to his old job.
The team finds the body of a dead census report taker in the trunk of a car, and the investigation takes a dangerous turn when it leads Wolfe and Boa Vista to a booby-trapped meth lab in an abandoned foreclosed home.