[1] It is the fourth installment in the Kokusai himitsu keisatsu series, a parody of James Bond-style spy movies.

In the film, the original dialogue is redubbed in English, transforming the plot into a comedic story centered around a secret egg salad recipe.

[2][3][4][5] In Tonwan, where he infiltrated, Kitami received a request from Suritai, the country's intelligence chief, to steal a large sum of hidden funds from Gegeng, the leader of the anti-government guerrilla group called "Yami."

Kitami, along with Meichin and Shiran, arrived in Japan to track down Gegeng's gang, which profited from illegal gambling and prostitution.

Disguised and aboard their ship, they aimed to seize Gegeng's funds but were met with a surprise—instead of cash, they discovered a coded message on a piece of paper.