A life like a rat hole, where not a single ray of light shines. Ji-an, who had to learn to give up before anything else just to survive, begins a fateful romance with Hwan, who appears in her life like a beam of light. But their happiness is short-lived. Hwan is hit by a car in Jian’s place. When she hears he’s regained consciousness, Jian rushes to his hospital room and opens the door—only to hear: "Stay away. You smell like an omega. It’s disgusting."