Junmo, who worked as a novelist. Jun-mo, who usually has good eyesight, goes to the hospital and receives an unbelievable diagnosis. Keratoconus is a disease that progresses rapidly and sooner or later you will lose your sight. Then, he receives a sudden proposal from his girlfriend, who hides his illness and accepts the proposal for fear that his love with her will be broken. Her mother-in-law proposes to live with her in the name of watching over Joon-mo, and she ends up living with a young mother-in-law who lost her husband early. The young mother-in-law likes the sincere Jun-mo more and more. Meanwhile, Hyuna is shaken by the confession of her talented boss...