Suk-yoon, a successful toy designer, and Jin-won, a respected textile designer, started off as a campus couple in college after falling in love at first sight. They are now happily married and well off, but have no children. Jin-won, raised by her aunt after the early death of her parents, anxiously craves her own motherhood. Her desperation grows despite Suk-yoon's efforts to comfort her. Then one day, the couple receives the miraculous news that they are pregnant. They are overjoyed and their days are filled with anticipation and love until they find out that what they thought would be a lifetime with their child will not last more than a day.
Unfortunately the movie A Day is not yet available on HBO Max.
| Sound | Cho Young-wuk | Music |
| Directing | Han Ji-seung | Director |
