Frustrated with her mundane life, a Tokyo office worker becomes obsessed with a fictional movie that she mistakes for a documentary. Fixating on a scene where stolen cash is buried in North Dakota, she travels to America to find it.

Set 2 years after prior film "Bayside Shakedown 3: Set the Guys Loose," a major case occurs that has the potential to take down the entire police organization. For the next 3 days, Shunsaku Aoshima and his colleagues struggle to unravel the case...