With the city in peril following the seawall's collapse, Oswald "Oz" Cobb seeks to fill the power vacuum left by the death of Carmine Falcone and finally give his mother Francis the life he's always promised. But first, Oz must confront his enemies and his own demoralizing reputation as "the Penguin."

Los Angeles, 1949. Ruthless, Brooklyn-born mob king Mickey Cohen runs the show in this town, reaping the ill-gotten gains from the drugs, the guns, the prostitutes and — if he has his way — every wire bet placed west of Chicago. And he does it all with the protection of not only his own paid goons, but also the police and the politicians who are under his control. It’s enough to intimidate even the bravest, street-hardened cop… except, perhaps, for the small, secret crew of LAPD outsiders led by Sgt. John O’Mara and Jerry Wooters who come together to try to tear Cohen’s world apart.

Doctor Reeve and his group of friends discover their annual trip is being stalked by a patient from the past.