Mac, Danny and Det. Flack are puzzled when they are called to a crime scene and find an ark in the murder victim's backyard full of people, live animals and rations. During interrogation, the passengers' stories confirm that they believed that the apocalypse was upon them and the victim had promised them salvation. Meanwhile, Stella and Sheldon investigate the death of a man who led anti-smoking protests and caught on fire while wearing a giant cigarette suit.
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