Burdened with heavy debt, Mok, a technical college student, applies for a high-paying job as a caregiver to Day, a badminton player with partial blindness due to infectious keratitis. Day hires Mok who—unlike other applicants—seems to take no pity on him. With so much time spent in each others' company, the two develop a deep bond. When Day learns he'll have approximately 90 days until he loses what vision he has remaining, how will the two weather the trials ahead?