"Hello?" "Is this the emergency contact of Seungcheol Choi?" Instead of his husband's sweet voice, a middle-aged lady's mechanical voice greeted him. "Ye-yes, I'm his husband." Jeonghan was starting to get scared. "This is the Chung-Ang University Hospital. Patient Seungcheol Choi has been admitted to the hospital after he fainted at his work. His colleagues-" Jeonghan's heart leapt into his throat, pounding against the walls of his chest with a frenzied intensity that left him breathless. - Or, the one in which a single phone call changes the trajectory of Jeonghan's life.