A 24-year-old boy majoring in science and engineering temporarily takes over the job of an elevator operator for his father. In a high-end residential building, he helps residents press the elevator floor buttons every day. The trivial work makes him feel quite tired of the world, and he always does it perfunctorily. His performance begins to attract the attention of the elder girls living in the building, bringing joy and humor to the small space of the elevator. He also understands his father's deep feelings for this job, and he also gains valuable life experience from it...