Hye-won, the director's wife, has always been the bane of the logistics warehouse part-timer's existence, constantly scolding him over trivial things. He always felt a mixture of frustration and complex attraction towards her.

However, everything changes just before closing time when a disastrous accident occurs: the part-timer and Hye-won accidentally get locked inside a tight, sweltering cargo container. The space is small, the heat is unbearable, and they are completely cut off from the outside world.

In this isolated, high-pressure environment, the built-up tension between them starts to erode. Their mutual anger gives way to overwhelming desire. As the hours tick by, the invisible line separating professional resentment and forbidden passion completely vanishes, leading them down a path of a dangerous, secret relationship.

This unforgettable night of confinement becomes a turning point that irrevocably alters the lives of both the part-timer and the director's wife. Prepare for a steamy, intense drama about infidelity and suppressed desires.