Keith rejoins the RIS just in time to work a double murder involving "Killer B"; an unknown group steals a military vehicle for a rampage.

The RIS investigates a death that appears to be linked to Killer B, though Keith disagrees; another body leads them to stake out a high-powered party.

Kaela battles the hackers as the poison gas release ticks closer; Keith drags Boris on a chase outside the city, pursuing Koku and one of the gang.

Koku and Keith both pay visits to the Royal Library; Lily heads to Keith's apartment to discuss her thoughts on the Killer B case.

The team members grapple with the attack on one of their own and the fact that there must be a traitor on the inside; Koku realizes who Canopus is.

After confronting Keith on the roof of the hospital, Koku agrees to meet him at a temple the next day; Keith is declared a murder suspect.