While Liv and Clive investigate the murder of a coffee shop owner with an extremely sunny outlook on life, Ravi tests the new cure on a rat before administering it to Major. Meanwhile, Boss discovers who has been moving in on his turf.

When Liv consumes the brain of a vice detective who doesn't play by the rules, her newfound recklessness gets her into trouble. Meanwhile, Major is coming really close to discovering Liv's secret.