Sung Jae suffers from hectic work schedule day and night and even does overtime work almost every night. One day, he falls asleep at work at night and in his dream, he visits the Bank of Seoul where he borrows sleep. Thanks to the sleep he borrows, he stays up while others are asleep and works on the company's project. With his hard works, he gets promoted and recognized as a competent man. And the bank manager visits him suddenly and asks him to pay off the sleep right away.