Underground Police Box 39: File 3 - The Woman in the Underground Video

A letter arrives in Box 39. The sender's name is Naomi Sasaki. ``I want you to pursue a certain scoop and find out the truth behind the death of my husband, who drowned at sea while reporting.'' The key to solving all the mysteries is a piece of the household account book that was enclosed as research material. Inexplicably, Sasaki's scoop that was scheduled to be published, ``The structure of a certain collusion, the household account book tells us'' was replaced at the last minute with a bland beauty treatment article. Did the publisher succumb to some kind of pressure? ? Or did he agree to some kind of exchange condition? ?