Three apparently unrelated suicides occur on the same day in Tokyo. One involves a young athlete, one a groom at his wedding reception, and the third an elderly man celebrating his wife's birthday. A middle aged detective investigating one of the cases begins to suspect a connection between the three when he discovers that each person mentioned a "green monkey" before they died. With the help of a young psychiatrist he formulates the theory that hypnosis is somehow involved. In the mean time other bizarre "suicides" are reported and the mystery intensifies. Who will be next? What is the truth? Can more deaths be prevented?

A short, direct and to-the-point media-commentary thriller. A sleazy TV producer trying to exploit a quiet otaku (an obsessive hobbyist) whose hobby is electronic eavesdropping ends up getting a lot more than he bargained for when they eavesdrop on the wrong conversation and he prods said otaku into helping him "investigate" the lead, only to find out that some things (and people) are not always as they seem, when a minor altercation causes things to take a rather nasty turn....