Ji-young, a contract worker, clears out her belongings on her last day at work. Just before leaving, Tae-young from the HR team asks her to return her employee ID. Reluctant to give it up, Ji-young hesitates, but the company insists that the ID must be used by the next employee. In the end, she leaves the office with only trivial items, feeling a sense of lingering regret. However, at the bus stop, an urgent matter forces her to return to the company. Without her ID, she finds herself locked out and stuck at the entrance. Fortunately, with the help of a new female employee who is set to take her place, Ji-young manages to re-enter the building. Standing at the crossroads between departure and a new beginning, Ji-young confronts the complex emotions of transition.