The FBI arrives at the twelfth precinct to help Barney and the detectives investigate a college student who inadvertently built a functional atomic bomb.

Levitt brings in a couple for fighting on the street and causing a scene. Dietrich and Wojo arrest a man for destruction of property and is told a wild story of ghostly possession. Yemana goes on a call to a bakery accused of making and selling obscene baked goods.