When a brilliant researcher accidentally turns an ordinary washing machine into a time-machine, the Japanese government convinces her to travel back to 1990 and prevent the announcement of landmark fiscal policy that triggered the nation's economic demise. But the mission hits a snag when the researcher disappears, forcing the government to send her estranged daughter, Mayumi - a debt-ridden bar hostess and the only other person the time machine will accept - back in time to find out what happened. Mayumi arrives at the peak of Japan's "bubble" economy and finds a society obsessed with wealth and profligate spending. With her warnings of impending doom falling on deaf ears, Mayumi's frustrated efforts to find her mother suggest some kind of conspiracy at work at the highest levels of government. Her own future and that of Japan's economy itself begins to hinge on her ability to recruit the help of one man: the same finance bureaucrat who sent her through time. The problem is, he's seventeen years younger and completely unreliable.