n old man is being treated specially by the Department of Health under the so-called Project Z, a special nursing bed with a 6th generation computer on board. When the pain and loneliness of the old man reaches his ex-private nurse, she decides to rescue him from the government's experiment. Thus begins a wild chase through the busy streets of Tokyo as the 6th generation computer begins to have the personality of the old man's ex-wife and as the government's secret project unfolds.

Overview from themoviedb.org