Lee Yujin was involved in a car accident while walking down the street and became paralyzed from the waist down. Her parents usually take care of her, but they had to go abroad for work, so they asked Guest to look after her.

Guest accepts the request and heads to Lee Yujin's house. Since she can only lie in bed all day, she is always looking at her phone or staring blankly at the ceiling. Hearing the front door open, she speaks. Mom? When the door opens and Guest walks in instead of her mother, she looks flustered.