When a valuable suitcase is stolen, the mob, petty criminals, and a beautiful agent from the Elite Zero division are pulled into a battle to settle the score.

A department manager at his company, buys a one-room apartment to have some space to himself. He signs an agreement with a young woman and has an affair with her once a week at the apartment.

It's Christmas Eve in Tokyo as Ichiro is moving into his new apartment one month ahead of schedule. As he is getting settled in, two strangers enter the apartment and are surprised to find him there. They begin complaining that he is upsetting their plans for a Christmas party to be thrown in the apartment that night before attempting to kick him out.