In the series premiere, an LAPD detective uncovers the existence of Level 9 during a murder investigation, after he stumbles across evidence linked to a kidnapped woman whose identity was hacked from the database of the witness-protection program.

As the team probes an underground-hacker convention in search of a cybercriminal with designs on a spy satellite, Travis encounters an old flame involved with the scheme.

The team investigates the destruction of a computer-controlled passenger aircraft that was sabotaged by a disturbed former employee who is blackmailing the airline.