Japan's largest blood donation room at Shinjuku East Exit, visited by 250 people a day. Blood products made from donated blood last only three weeks. Platelets last only 72 hours. The blood donation rooms offer free hamburgers, ice cream, palm readings, and massages to attract donors, but the inventory is always tight. This film follows the 72-hour process of blood delivery to medical institutions, using the Shinjuku East Exit Blood Donation Room as its main setting, and examines the reality of blood distribution, which is indispensable for medical care.