Naomi Shimizu is a young career woman working for Enrico Dandolo, an Italian fashion house. That is until one day the company declares bankruptcy. Accustomed to living in luxury she tries to make a run for it with the last remaining company asset, a red Alpha Romeo sports car. Unfortunately she recklessly collides with an bicycle messenger. Lacking any funds to pay for a settlement, she end up having to work as a bicycle messenger.
It's 2007 and the Japanese Ministry of Finance have calculated that the economy will collapse in two years' time. They intend to prevent this by sending home appliance designer Mariko back in time 17 years using a time machine she accidentally invented. However, things don't go as planned and Mariko's daughter, Mayumi, is also sent back to find her mother and save Japan's economy.
The year is 1982, and the place is Shōnan in Kanagawa Prefecture, Japan. A group of passionate young people operate a beach radio station for the local community.
